Journal AES Volumen 10-19

Journal of the

AU DIO ENGINEERING SOCIETY E s

I JANUARY 1962 VOLUME 10, NUMBER 1 OFFICERS F O R 1961-62

President HERMON H. SCOTT

Execntive Vice-President H. E. ROYS

Central Vice-President JOHN S. BOYERS

Western Vice-President WILLIAM H. T H O ~ I A S

Secretary C. 3. LEBEL

Treasurer R. A. SCHLECEL

BOARD O F GOVERNORS

H ~ R R Y L. BRYANT MURRAY G. CROSRY

JOIIN M. HOLLYWOOD HARRY F. OLSON

DONALD J. PLUNKETT HARVEY SAMPSON, JR.

M. R. SCHROEDER WALTER T. SELSTED EDWARD H. UECKE

COMRlITTEE CHAIRMEN

Admissions-M. R. SCHROEDER A wards-WALTER 0. STANTON

b Convention-H. E. ROYS ~ X ~ ~ ~ ~ ~ S - J A C Q U E L I N E HARVEY

Finance-R. A. SCHLEGEL Historica~-C~~S'1ER A. RACKEY

Laws B Resolutions-A. A. PULLEY Membetship-L. R. BURROUGHS Nominations-HARRY F. OLSON

Papers Procuremenf-JOHN M. HOLLYWOOD Pztblic Relations-JACQUELINE HARI~EY C98 Representative (Combined Visual

A w a l Recording for Television)- FRANK COMERCI

Sectioas-E. H. UECKE Standards-D. R. VON RECKLINGHAUSEN

Szcstaining ,Wemberships-- HARVEI SAMPSON, JR.

SECTIONS

Los Angeles San Francisco New York Japan

British Liaison

British Sound Recording Association London W. C. 1, England

The New Stereo FM Broadcasting Sytsem-How to Understand the FCC Specifications and Generate the Composite Signal-A. Csicstka and K . ill. Linz . . . 2

Compatibility Problems in Two-Channel Stereophonic Recordings-F. K. Narvey and E. B. Uecke . 8

A Doubler Adaptor for FM Stereophonic Reception -Richard L. Il/liller . . . . . . . . 13

A Compatible FM Multiplex System for Stereophonic Television Service-W. S. Halstead and R. W . Buf,den . . . . 16

Multiplex Stereo FM Tuners and Adaptors . . . . . . . . -Daniel R. von Recklinghausen 23

Criteria for Compatible AM-FM Stereo as an Interim Method for FM Multiplex Stereo-F. K. Becker . . . . .

A Multiplex Stereo Generator -D. R. von Kerklinghazisen and T. W . Pickett .

Audio Considerations for Stereophonic Broadcasting . . . . . -R. W . B w d e n and S. E. Frohock

. . . . Transistor Front Ends for FM Tuners-T. C. Lasson Time Base Distortion in Continuous Recording Systems: Its

Terminology, Measurement, Causes and Effects . . . . . . . . . . -John G. McKnight

Absolute Method for Aligning Magnetic Recording Track Using Electrical Technique -F. Slaker, W. Gztckenburg and F . Conzerci . .

Approaches to Wideband, High-Resolution Magnetic Recording . . . . . . . . . . . -J. G. Woodward

Some Studies on the Reduction of Head Wear Caused by Magnetic Tapes and a Test Device for Measuring the Relative Wear on a Simulated Head

. . . . . . ,4. L. Tufano and G. Flower, Jr. (A11 the papers in this issue were presented at the 1961 Fa811 Convention.)

Fall Convention . . . . . . . . . . . . . . . . . . 65 Complete Program Information . . . . . . . . . . 68 Section Meetings . . . . . . . . . . . . . 82 Letters to the Editor . . . . . . . . . . . . . 86

. . . . . . . . . . . . . . . . . . . . . Soundtrack 88 Membership . . . . . . . . . . . . . . 90

EDITORIAL BOARD WILLIAM S. BACHMAN FLOYD K. HARVEY HARRY F. OLSON FRANK COMERCI MARVIN B. HERSCHER JOHN PRESTON NORMAN H. CROWHURST CLYDE R. KEITH EDWARD SCHMIDT HELLMUTH ETZOLD C. J. LEBEL FRED D. WALDHAUER RALPH GLASCAL JOHN G. MCKNIGHT SHELDON I. WILPON

J. G. WOODWARU il.fanaging Editor: JACQUELINE HARVEY

Productioa Editor: IRMA VAN STEENBURGH C o p y Editor: ELIZBETH BRAHAM Address manuscripts and editorial correspondence to the Secretary, Audio En- gineering Society, Box 12, Old Chelsea Station, New York 11, New York. Mem- bership information and back copies may also be obtained from the Secretary.

Journal of the Audio Engiuecring Society, Volume 1 0 , Number 1 , January 1962. Publislied quartorly by the Audio Engineering Society and supplied to all members in good standing. Publication office, 104 Liberty Street, Utim, N. Y. Executive and editorial offiee, P. 0. Box 12, Old Chelsea Station, New York 11, N. Y. Entered as second class matter at the post office at Utica, N. Y. Subscript~ons to nonmembers, $11 per gear. Copyright 1962 by the Audio Engineering Society. The Journal is indexed in tlie Applied Science & Technology Index .

Permission to reprint, in whole or in part, material originally appearing in the Journal must he obtained in writing from the Secretary.

Journal of the

AU D I O ENGINEERING SOCIETY E s

I APRIL 1962 VOLUME 10, NUMBER 2 OFFICERS FOR 1961-62

President HERMON H . SCOTT

Executive Vice-President H . E. ROYS

Central Vice-President J O H N S . BOYERS

Western Vice-President W I L L I A M H. T H O M A S

Secretary C. J. LEBEL

Treasurer R. A . SCHLECEL

BOARD OF GOVERNORS

COMMITTEE C H A I R M E N

A wards-WALTER 0. STANTON Convention-H. E. ROYS

E x h i b i t s - J A ~ ~ u ~ ~ ~ i v ~ HARVEY Finance-R. A. SCHLEGEL

Hist~rical-CHESTER A . RACKEY Laws 8 Resolutions-A. A. PULLEY

Membership-L. R. BURROUGHS Nominations-HARRY F. OLSON

Papers Procurement-JOHN M. HOLLYWOOD Public Relations-JACQUELINE HARVEY C98 Representative (Combined Visual

Aural Recording for Television,l- FRANK COMERCI

Sections-E. H. U E C K E Standards-D. R. V O N RECKLINCHAUSEN

Sustaining Membel-ships-

SECTIONS


British Liaison

British Sound Rec0rdin.g Association London W . C. 1, England

The Assessment of Two-Channel Stereophonic Reproduction Perform- ance in Studio Monitor Rooms, Living Rooms and Small Theatres-Gilbert F. Dutton . . . . . . . . .

The Case Against Low-Frequency Pre-Emphasis in Magnetic Recording -John G. McKnight . . . . . . . . . . . .

Improvement of Feedback Stability of Public Address Systems by Frequency Shifting-M. R. Schroeder . . . . . . .

A Frequency Shifter for Improving Acoustic Feedback Stability --A. J . Prestigiacomo and D. J. MacLean . . . . .

Practical Stereo Reverberation for Studio Recording-John P. Davis . An Investigation of Speed Variations in a Magnetic Tape Recorder, with

the Aid of Electro-Mechanical Analogies-W. H701j . . Transistorized 3-Channel Mixing Console, for Simultaneous FM Multi-

. . . . plex and AM Broadcasting-Philip C. Erhorn Electronic Sound Absorber-J. C. Bleazey . . . . . . . . . . A Cordless Voice-Assist System for a Small Auditorium

-D. E. Thomas and F. K. Harvey . . . . . . . Speech Compression by Analysis-Synthesis

. . . . -Frank H. Slaymaker and Robert A. Hoz~de Influence of Transmission Error on Formant Coded Compressed Speech

Signals-S. J. Campanella, D. C. Coulter, and R. Irons . Analysis of the Effects of Nonlinear Elements Upon the Performance of

a Back-Enclosed, Direct Radiator Loudspeaker Mecha- nism-Harry F. Olson . . . . . . . . . . . .

Correlation Techniques for Speech Bandwidth Compression . . . . . . . . . . . . . --$I. R. Schroeder

Sound System Operations- D. Kaye and D. L. Klepper 167 Shopping the Audio Market . 182

LetterstotheEditor . . . . 174 MembershipInformation . 188 . . Section Meeting Reports 176 Current Publications . . . 190

Sound Track . . . . . 180 Obituaries . . . . 192

EDITORIAL BOARD

Managing Editor: JACQUELINE HARVEY Production Edit0.r: I R M A V A N STEENBURGH Copy Editor: ELIZABETH BRAHAM

Address manuscripts and editorial correspondence to the Secretary, Audio En- gineering Society, Box 12, Old Chelsea Station, New York 11, New York. Mem- bership information and back copies may also be obtained from the Secretary.

Journal of the Audio Engineering Society, Volume 10, h'umber 2, April 1962. Published q u a r t e r l ~ by the Audio Engineering So,eiety and supplied to all members in good standing. Publication office, 104 Liberty Street, Utica, X. Y. Executive and editorial office, P. 0. Box 12, Old Chelsea Station, Nen. Pork 11, h'. Y. Entered as second class matter a t the post office a t Utic~%, N. Y. Subscriptions to nonmembers, $11 per year. Copyright 1962 by the Audio Engineering Society. The Journal is indexed in the Applied Xcie?~cl! & 'fechnology I n d e s .

Permission to reprint, in ~ r l ~ o l e o r in part , material originally appearing in the Journal must be obtained in Tvriiing from the Secretary.

I

Journal of the


OFFICERS F O R 1961-62


Executive Vice-President H. E. Rays

Central Vice-President JOHN S. BOYERS

Western Vice-President WILLIAM H. THOMAS

Seuetary C. J. LEBEL

Treasurer R. A. SCHIXGEI

BOARD O F GOVERNORS

HARRY L. BRYANT MURRAY G. CROSBY

JOHN M. HOLLYWOOD HARRY F. OLSON

DONALD J. PLUNKETT HARVEY SAMPSON, JR.

M. R. SCHROEDER WALTER T. SELSTED EDWARD H. UECKE

COMMITTEE CHAIRMEN

. . Laws d Resolutions-A. A. PULLEY Memberslzip-L. R. BURROUGHS Nontinations-HARRY F. OLSON

Papers Procurentent-JOHN M. HOLLYWOOD Public ~ e ~ a t i o n s - J ~ c ~ ~ ~ ~ 1 ~ ~ HARVEY C98 Representative (Combined Viszcal

Auval Recording for Television)- FRANK COMERCI

Sections-E. H. UECKE Standards-D. R. VoN RECKLLNGIIACSEN

Sustaining Memberships- HARVEY SAMPSON, JR.

SECTIONS


Britislt Liaison

British Sound Recording Association London W. C. 1. England

Development of a Low Loss, High Precision Permeameter for the Evaluation of High Energy Permanent Magnets -David HI. McGann . . . . . . . . 194

Transistorized Tone Burst System for Transient Response Testing of Loudspealiers-M. J. Whitternore, J r . . . 200

4 Sound Stimulus Source for Psychological Exlserimentation -John A . Cooley . . . . . . . . . 204

I Design of a Transistorized Oscillator-David S. Cochon . . . . 208

Condenser Earphones with Solid Dielectric -G. M . Sessler and J. E. W e s t . . 2 12

. . . . Doppler Type Organ Tone Cabinet-William V. Afachanian 2 16

Natural Sounding Artificial Reverberation-M. R . Schroeder . 219

Loudspeaker Enclosure Walls-Peter W. Tappan . . . . 224

Design Aspects of Transistor Power Amplifiers-Robert F. Chase . . 232

A High Power Voltage Regulation Circuit for High Power Transistorized Amplifiers-Willimn R. Coakley . 236

On the Transient Response of Ideal Crossover Networlis --J. RobertAshley . . . . . . . . . . . 241

The Design and Performance of an Integrated Stereo Pickup and Arm -P. J. Pyke . . . . . . . . . . . 245

. . . . West Coast Convention 250 Shopping the Audio Market 262

Supplementary Requirements of Transistor Preamplifier

. . . . . Sound Track

Power Supplies-~,-I. weiss 252 Alembership Information . . 268

Letters to theEditor . . 258 Current Publications on Audio 270

EDITORIAL BOARD

Managing Editor: JACQUELINE HARVEY Copy Editor: ELIZABETH BRAI-IAN Production Editor: MARY JANE COLLINS Associate Editor: F R ~ N C E S WASKES

Address manuscripts and editorial correspondence to the Secretary. Audio En- gineering Society, Box 12, Old Chelsea Station, New York 11, New York. Mem- bership information and back copies may also be obtained from the Secretary.

-

J o u ~ , , n l of the I n d i o Engitleering Society. Yolqme 10. Suinbrr S. July 1962. l'nblished quarterl? b? the Audio Engineering Societ?- alld supplied to all members in good standing. Puhlieztion office. 104 Liberty Street. Utica. S. y. I!kecutiue and editorial office. P . 0. Box 12. Old Chelsea Station, Sew Yorl; li. X. V. Entered as second class matter a t the post ofice a t Ulica. 3. 'I. Snbscriptione to nonmembers, $11 per rear . Copyright 1962 hp the dudio Engineering Societ?. The Journa l is indexed in the Applied S c i e n r . ~ (6 ?c'ciznology I n d c z .

Perniission to reprint. ill \\-hole 01. in part , material originally appearin:. in the Journa l must be obtaincd in writing from the Secretary,

Journal of the

AU DIO ENGINEERING SOCl ETY



Executive Vice-President H. E. ROYS

Central Vice-President A. BERNARD CLAPPER Western Vice-President

WILLIAM H. THOMAS Secretary

C. J. LEBEL Treasurer

R. A. SCHLECEL

The Rational Design of Phonograph Pickups-F. V. IIunt . . . . 274

Control of Static Electricity on a Phonograph Record-G. P. Hunzjeld 290

A Two Speaker, Acoustically Coupled, Single Enclosure Stereo System -John H. Riggs . . . . . . . . . . . . . . 294

A New Concept in Monitor Control-E. G. Dyett, Jr . . . . . . . 298

COMMITTEE CHAIRMEN

Admissions-M. R. SCHROEDER A wards-WALTER 0. STANTON

Convention-H. E. ROYS E x h i b i t s - J ~ c ~ u ~ ~ l N ~ HARVEY

Finance-R. A. SCI~LEGEL

BOARD OF GOVERNORS

HARRY L. BRYANT

H i s t o r i c a ~ - C ~ E s ~ ~ R A. RACKEY Laws d Resolutions-A. A. PULLEY

Membership-L. R. BURROUGHS No.minations--HARRY F. OLSON

Papers Procurement-JOHN M. HOLLYWOOD Public h ' e ~ a t i o n s - J ~ c Q u ~ L ~ N ~ HARVEY C98 Representative (Combined Visual

Aural Recording for Television)- FRANK COMERCI

Sections-E. H . UECKE Standmds-D. R. VON RECKLINCHAUSEN

Sustaining Memberships- HARVEY SAMPSON, JR.

A Figure of Merit for Horn Loudspeaker Drivers-E. A. Fagen . . . 302

SECTIONS

A Method of Testing Loudspeakers with Random Noise Input --Edgar Villchur . . . . . . . . . . . . . . 306

Distortion of High-Frequency Loudspeakers-Philip Kantrowitz . . 310

I h New ASA Standard Sound Level Meter-D. B ~ u c e Longrnuir . . . 318

Sound Activity of the California Gray Whale, Eschrichtius glaucus . . . . . -WilliamEvansatzdRobertL.Eberhardt 323

. . . . I A Special Purpose Language Laboratory-U:. F. McAllister 329

New All-Transistor Sound Sound Track . . . . . . 350 Meter-T. W. Pickett . Shopping the Audio Market . . .

for Multid~eaker hlembership Information , 356 Presentations of Electronic Music-Peter Mauzey . . 338 Current Publications on Audio 357

EDITORIAL BOARD

Los Angeles San Francisco Managing Editor: JACQUELINE HARVEY Copy Editor: ELIZABETH BRAHAM I New York Japan Production Editor: MARY JANE COLLINS Associate Editor: FRANCES WASKES

British Liaison


i


Journal of the Audio Engineering Society. Tolome J O . Somber 4. October, 1962. Published quilrterly by the Audio Engii~eering Society and snpplied to all members in good standing. Publication office. 104 Liberty Street, Utica, S. Y. Executive and editorial office. P. 0. Box 12. Old Chelsea Station, Kew York 11, K. P. Entered as second class matter at the post office a t Utica. P;. Y. subscription^ to nonmembers, $11 per gear. Copyright 1962 by the Audio Engineering Society. The Journal is indexed in the AppEied Science d Technologu Index .

Permission to reprint, in whole or in part, material originnllv appearing in the J'ournal must be obtained in writing from the Secretary.

Journal of the


Executive Vice-President FLOYD K. HARVEY

Central Vice-President HUGH S. KNOWLES

Western Vice-President JOHN K. HILLIARD


-


Treasurer R. A. SCHLEGEL

JANUARY, 1963 VOLUME 11, NUMBER 1

BOARD O F GOVERNORS

HARRY L. BRYANT F. V. HUNT IRVING JOEL

JOHN G. MCKNIGHT HARRY F. OLSON

HARVEY SAMPSON, JR. H. H. SCOTT

EDWARD H. UECKE D. R. VON RECKLINGIIAUSEN

COMMITTEE CHAIRMEN

Admissions-D R. VON RECKLINGHAUSEN A wards-HARRY F. OLSON

Convention-FLOYD K. HARVEY Exhibits-JACQUELINE HARVEY

Finance-R. A. SCHLEGEL Laws 63 Resolutions-A. A. PULLEY Membership-WARREN L. BRAUN

Nominations-H. H. SCOTT papers Procurement-JOHN HOLLYWOOD

Public ~ e ~ a t i o n s - J ~ c ~ u ~ ~ 1 ~ ~ HARVEY Sections-EDWARD H. UECKE

Standards-WILLIAM MILTENBURG Sustaining membership-

HARVEY SAMPSON, JR.

SECTIONS


British Liaison

British Sound Reco rd ing Association London W. C. 1, England

A Report a t the CCIR Study Group X Conference in Bad Kreuznach, . . . . . . . . . . . Germany-William H. Beaubien 2

Further Thoughts on Geometric Conditions in the Cutting and Playing . . . . . . . . . . . of Stereo Discs-C. R. Bastiaans 6

A Study of Program-Level Overloading in Phonograph Recording . . . . . . . . . . . -J. G. Woodward and E. C. Fox 16

Program-Level Overloading and Equalization in Phonograph Recording . . . . . . . . . . . -E. C. Fox and J. G. Woodward 24

. . . . . . . . . . Meter Ballistics Testing-H. C. Littlejohn 30 . . . . . . The Sound System of Sound and Light-E. R. Hanson 32 . . . . . . 1 Kilowatt Transistor Audio Amplifier-R. S. Burwen 34

Intelligibility Test of Communication Ear Defenders in an Area of Ex- . . . . . tremely High Intensity Noise-Robert P. Devaney

Preliminary Experiments on the Aural Significance of Parts of Tones of Orchestral Instruments and on Choral Tones-Melville Clark, Jr., David Luce, Robert Abrams, Howard Schlossberg and James Rice

The Creation of Melodic Contours from Non-Melodic Raw Material Without Loss of Text or Timbre-Myron Schaefler . . . . .

Techniques of Program Level Measurement Applicable to FM Stereo -D. Ridgely Bolgiano . . . . . . . . . . . . .

Stereo Operational Experience of WQXR-FM New York -Louis J. Klein,klaus . . . . . . . . . . . . . . .

Practical Preparation for FM Stereo Multiplexing -E. J. Gilbert and K. A . Blake . . . . . . . . . . .

Stereophonic FM Distortion Caused by Cross-Talk into the Pilot Carrier -Edward B. Bench, Jr. . . . . . . . . . . . . .

Fall Convention, 1962 . . . . 66 Available Literature . . Complete Convention Program . 70 Sound Track . . . . . . Section Meetings . . 86 Membership Information . .

Shopping the Audio Market . . 92

EDITORIAL BOARD

Managing Editor: JACQUELINE HARVEY Copy Editor: ELIZABETH BRAHAM Production Editor: MARY JANE COLLINS Associate Editor: FRANCES WASKES


Journal of the Audio Engineering Society, Volume 11, Kumber 1. January, 1963 . Pul~lished quarterly by the Audio Engineering Society and supplied to all members in good standing. Publication office, 104 Liberty Street, Utica, S. Y . Executive and editorial office. P. 0. Box 12, Old Chelsea Station, Yew York 11, P;. Y. Entered as second class matter a t the post office at Utica, N. P. Subscriptions to nonmembers, $11 per year. Copyright 1962 by the Audio Engineering Society. The Journal is indexed in the Applied Science & TechnoZogy Index .

Permission to reprint, in whole or in part, material originally appearing in the journal must be obtained in writing from the Secretary.

Journal of the

AUDIO ENGINEERING SOCIETY E s

OFFICERS FOR 1962-63

Presilicnt H. E. ROYS

Executive Vice-President FLOYD K. HARVEY





BOARD O F GOVERNORS

COMMITTEE CHAIRMEN

Admissions-D. R. VON RECKLINCHAUSEN A wards-H~R~Y F. OLSON

Convention-FLOYO K. HARVEY Exhibits-JACQUELINE HARVEY

Finance-R. A. SCHLECEL Laws B Resolutions-A. A. PULLEY Mem bership-WARREN L. BRAUN

Nominations-H. H. SCOTT Papers Procurement-JOHN HOLLYWOOD

Public R e l a t i o n s - J ~ c ~ U ~ ~ 1 ~ ~ HARVEY Sections-EDWARD H. UECKE

Standards-WILLIAM MILTENBURG Sustaining Membership-

HARVEY SAMPSON, JR.

SECTIONS


British Liaison


Design Aspects of Low Distortion Transistor Amplifiers -Murray Barlowe . . . . . . . . . . . . . . .

Stylus Mass and Reproduction Distortions-J. Walton . . . . . . Transient Response and Intermodulation Studies in Phonograph Repro-

duction--Benjamin B. Bauer, Arnold Schwarta and Arthur J . Gust . . . . . . . . . . . . . . . .

The Voice Interference Analysis Set, an Instrument for Determining the Degradation of Signal Quality of a Voice Communications Chan- nel-Joel M . Goldberg . . . . . . . . . . . . . .

The Transmission and Recording of Shaft Position by Means of Audio Tone Bursts-Bernard M. Van Emden . . . . . . . .

Correlation Studies Relating Magnetic Measurements to Audio Fre- quency Performance on Magnetic Tape-Donald H. Blouch and Walter L. Anderson . . . . . . . . . . . . . . .

The Role of Recorded Voice Services in Telephony-W. C. Tillistrand Compatibility-A Major Requisite in the Telephone Industry

. . . . . . . . . . . . . . . . . -J. N. Petrie Man's Need to Communicate-Past, Present and Future

. . . . . . . . . . . . . . . -C. W. Vadersen Some Practical Aspects of FM Stereophonic Broadcasting-Ross Utter Planning a New FM Stereo Station-Lloyd M. Jones . . . . . . Anomalies of Presently Accepted FM Stereo Measurement Technique

-Robert A . McClanathan . . . . . . . . . . . . Management FM Stereo Installation Problems-Charles N. Duncan . Stereo Experienceat WASH-FM-Everett L. Dillard . . . . . . FM Multiplex Stereo Installation at WH00-FM-Charles K. Chrismon

. . . . . . . . . . Sound Track 184 Letters to the Editor . . . . . . Shopping the Audio Market 186 Section Meetings

. . . . . Membership Information 189 Book Reviews . . . . Available Literature 196

EDITORIAL BOARD

Managing Editor: JACQUELINE HARVEY Associate Editor: FRANCES WASKES Production and Copy Editor: ELIZABETH BRAHAM

Address manuscripts and editorial correspondence to the Secretary, Audio En. gineering Society, Box 12, Old Chelsea Station, New York 11, New York. Mem- bership information and back copies may also be obtained from the Secretary.

I

Journal of the Audio Engineering Society, Volume 11. Number 2 . April, 1963. Published quarterly by the Audio Engineering Society and supplied to all members in good standing. Publication office, 104 Liberty Street, Utica, K . Y. Executive and editorial ofice. P. 0. Box 12, Old Chelsea Statlon. New York 11, h'. Y. Entered as second class matter a t the post office a t Utiea, N. Y. Subscriptions to nonniembers, $11 Per year. Copyright 1963 by the Audio Engineering Society. The Journal is indexed in the Applied Science 02 Technology Index .

Permission to reprint, in whole or in part, material originally appearing in the Zou~na l must he obtained in writing from the Secretary.

Journal of the

AU Dl0 ENGINEERING SOCIETY


Presidea t H. E. ROYS

Executive Vice-President FI-ouu K. HARVEY


Western Vice-President J o r r ~ I(. HILL~ARD

Secretary C. J . LEBEL

Treasurer R. A. SCI~LECEL

BOARD OF GOVERNORS

COMMITTEE CHAlRMEN

Admissio~zs-U. R. \ow R~CKLINGHAUSBN A wards-H4an~ F. 01 sou

Co?zventiotr-FLOYD K. HARVPY ~ ~ ~ ~ ~ ~ ~ ~ - J A c Q u E L I K E HARVEY

Finance-I<. A. SC~ILECEL Laws @ Resolzitions-A. A. PUI.LFY ik'embership-WARREN L. RRATJN

Nomi~ations-H. H. SCOTT Papers Prorztrement-JOHN HOLLYWOOD

Pwblic Relations-JACQLI LINE HARVEY ~ e c t i o ~ t s - ~ u w A R ~ H. UECKE

Standards-W~~~~.lanr M I I ~ ~ ~ E N ~ U R C S~istaining Membership-

H ~ R V ~ Y SASIPSON. JR.

SECTIONS


British Liaison


C'onstant Directional Characteristics from a Line Source Array . . . . . . . -David L. Klepper and Douglas Hr . Stfelt, 198

. . . Loudspeaker kleasurements in Live Rooms-George I%'. Sioles 203

. . . . . . 011 the Damping of Phonograph Arms-B. B. Baucr 207

Some Aspects of Stereophony Applicable to Conference Use --F. I<. Harvey, J . G. Gisek, D. J. MacLean a ~ d IW. R. Schroeder 212

An Automatic Overplay System for Magnetic Tape and Record-A Step Towards Automation in Studio Operation

. . . . . . . . . . . -H. X ~ d l i c h aizd A. . I . Klenzp 21 X

A Simplihed Frequency Shifter for Improving Acoustic Feedback . . . . . . . . . . . . Stability-M. D. Burkhard. 234

Sound Reinforcement in Television Broadcasting-,,I. Pierce Evans . 238

Short-Haul 4-Wire Communications-Williallz J . Brilzker and . . . . . . . . . . . . . . . . . C . E . L V o o d . 244

High-Frequency Stylus Groove Kelationships in Phonograph Cartridge . . . . . . . . . . . l'ransclucers-Phi@ Iiantrowitz 250

A Siinple Quality Rating System for Loudspeakers a i d Audio Systems . . . . . . . . . . . . . . . . L i ~ z t o l n Walsh 263

Intermodulation Distortion in Tape Recording-Robert Z . Langfvin . 2 7 0

Spring Convention, Current Publications on Audio 285 . . . . . . Los Angeles, 1963 . . . 2 6'3 Sound Track 286

LetterstotheEditor . 280 3Iembership Inforlnation . 288 Section hfeetings . . . . . 284 Shopping the Audio LIarBet . 290

EDITORIAL BOARD

Managing Editor: JACUUBI.INE HARVRY Associate Editor: FRANCES WASKES

Production and Copy Edifor: ELI%AIIETH BRAHAM


I

JIJUI.II;I~ ~ J C tlir. .Illdin I3t1gilrccl.it1g Sorift?, Volllrrle 11. Numher 3. J u l y , I!Jli:I. T'nhlisl~~rl quarbcrly b y the u d i o E ~ ~ a i n e e r i ~ ~ g Scrciety ;nld supplied lo :ill memhcrs 111 erroil s t n ~ i d i ~ ~ p . I'u1,lic;ition oftii,r, 10.1 T,ihurly Street, Utica, ?;. Y. Exe<:ut,ive and editorial oi'fi~~'. 1'. 0. DCIX 12 , Old Chelien Station. e 1 I . 1 . En tncd a s wcol~il <.l;~,ss ~ n ; ~ t t n . nt t h c ~,o,si. o f i c ~ at 1~Itic:l. K. Y. S~~bsoipt . ions t o nontnrtilb~~i-s, $ 7 1 per yea,r. Cirl~yright lRf5:I by I11f. huil i i~ Esii'irrer~ring Soviet?-. l'i~t: J l ~ l ~ r , ~ n l is iilrlexed in tlio App l i ed Sci~wiv? (1" 1.'oi.li?~~olog~ 1 n r l p . r .

1'n.rnission to reprint. in n.holo 01. ill part , ~ t ~ i ~ t ~ r i n l originally appearing in tlls Jourlial must he oirtainail in \n-iting Sl.orn t,he S'ecret;sry. The "Jor i~~ntr l r ~ j t l i i , 11 rr(7iu Engi?ri,evinq Society" and i ts covcv design hns I I ~ P ~ L repisirred ;IS a Ir;~denrark ill ihe I-nited St,ntes Pateul Office.

President H. E. ROYS

Executive Vice-President F I ~ Y D K. HARVEY

Journal of the

AU DIO ENGINEERING SOCIETY E s ----






OCTOBER, 1963 VOLUME 1 I , NUMBER 4

BOARD O F GOVERNORS

COMMITTEE CHAIRMEN

Admissions-D. R. VOX RECKLINGI-IAUSEN A wards-HARRY F. OI.SON

Convention-FLOYD K. HARVEY Exhibits-JACQUELINE HARVEY

Pinance-R. A. SCHLEGEL Laws 8 Resolutions-A. A. PULLEY Membership-WARREN L. BRAUN

Nominations-H. H. SCOTT Pafiers Procurement-JOHN HOLLYWOOD

Public R e ~ a t i o n s - J A c ~ ~ ~ ~ 1 ~ ~ HARVEY ~ e c t a ' o n s - E ~ w A ~ ~ H. UECKE

Standards-WILLIA~~ MILTENBURG Sustaining Membership-

HARVEY SAMPSON, JR.

SECTIONS


British Liaison


Tracing Distortion-Its Causes and Correction in Stereodisk Recording Systems-E. C. Fox and J. G. Woodward . . . . , . . . 294

1 A Resume of Current Activities of CCIR Study Group X of Particular Interest to Audio Engineers-A. Prose Walker . . . . . .

Problems in the Measurement of Reverberation Time-T. J . Schultz

Compensation for Tracing and Tracking Error-Duane H . Cooper . .

Mechanical Impedance Measurements a t the Stylus of Stereo Phono- graph Cartridge Transducers-Philip Kantrowitz . . . . .

A Reflex Wien-Bridge Oscillator, with Analysis-Joel H. Levitt .

-4 Two-Gram Phonograph Pickup System for Home Record Changers -B. B. Bauer, il. L. DiMattia, E. Kauli~zs and G. W. Sioles

A Personal Voice Amplifier-D. J. MacLean , . . . . . . . .

Speech Digitizing Techniques-Glen R . Southworth , . . , ~ .

An Electron Cloud Head for Reproduction of Tape Recordings -Marvin Catnras . . . . . . . . . . . . . . .

A Multi-Purpose Studio Recording System-John P. Daz~is . . . .

Letters to the Editor . . . . 372 Current Publications on Audio Sound Track . . . . . . 376 Membership Information . . Section Meetings . . . , . 378 Shopping the Audio Market .

Subject and Author Index . . 385

EDITORIAL BOARD

Managiag Editor: JACQUELINE HARVEY Associate Editor: FRANCES WASKES Production and Copy Editor: ELIZABETI~ BRAHAM

Address manuscripts and editorial correspondence to bhe Secretary, Audio En- gineering Society, Box 383, Madison Square Station, New York 10, New York. Membership informaltion and back copies may also be obtained from the Secre- tary.

I

Journal of tlre Sudio Engineering Society, Volulne 11, N u m h e ~ 4, October, 1963. Published quarterly by the Audio Engineering Society a n d supplied to all members in good standing. Publication office, 104 L~be r ty Street, Utica, S. Y . Executive office, Box 383, hfedison Sqaare Stslion, Ne\i- York 10. ?;. Y. Entered as second class :natLor at the ~ o s t officc? a t Utica, 3. Y. Subscriptions to nonmembers, $11 per year. Copyright 1963 by the Audio Engineering Society. The Jou r l~a l ir indexed in the Applied Science d Tschrbology I n d s z .

Permission to rel)l.int, in whole o r in part, nlateri:~l originally appearing in the Journal must he obtained in writing from the Secretary. The "Journr~l of the Audio firngineevino Societil" and its cover design has been registered as a trademark In the United States Patent Office.

FLOYD K. H 4 a v ~ v I Integrated Treatment of Tracing and Tracliiilg Error . . . . . . . . . . . . . . . Executive Vice-Pi esidettt -1luane H. Ca( lpe~ 2

1 3 ~ ~ 1 ~ 1 . W. MARIIN

Journal of the

AU DIO ENGINEERING SOCIETY

Western Vire-President H ~ J R E R T W. PIERCE


P re~ iden t


JANCJARY, 1964 VOLUME 12, NUMBER 3

BOARD OF GOVERNORS

R. T. B 0 7 4 ~ F. V. HUNT IRVING JOFL

JOIIN G. MGKNIGIII W. H. MII.~ENRURC

HARRY F. O I ~ S O ~ H. E. Rovs H. H. S C ~ T I

D. R. YON RI~CKLINCHAUSFN

COMMITTEE CHAIRMEN

A dmissiovis-R. T. RWZAK Awards-H. H. SCOTT

Convetitiow-DANIEL W. MARTIN B x h i b i t s - J ~ c C ) u E : ~ ~ ~ ~ HARVEY

Finatice-R. A. SCTII.EGET. Histo~ical-C. A. KACKEY

Laws d Resolutions-A. A. PULLEY ~Vlembership-D. R. VUN RECKLINCHAUSEN

Nominotiotts-H. E. Rovs Papers Procuremetzt-RONALI) D. KI.U~LIPEN

Public ~ e ~ a t i o n s - . ~ ~ c ~ t ~ ~ L l ~ ~ HARVEY Sections-E~\~.4~1) H. UECKB

Stat~dards-W~r,~~a\r H. MII:~ENRURG Sttstaininji Metnbership-H. Sal\ .rrso~, JR.

SECTIONS

Los Angeles San Francisco New York hlidwest

Vertical Tracking Angle Errors in Stereoclislr Systems -J. B. Halter and J . G. liroodward . . . . . . . . . 8

. . . . . . I Audio Aicls and Commission Policy-Robert 1,. Cutts 15

Parametric Input Stages in Electroacoustics. 1. Low Noise Plajrhack . . . . Amplifier in AIagnetic Recording-Edmond de J i e t 2 1

Dependence of Timbre 011 the To~lal Loudness Produced by Musical . . . . . Instruments-Dlrlville Clark, Jr., and Paul Milrzer 28

. . . . . . . . . . Magnetic Tape Cartridges-./lustin Knox 32

A Kew Magnetic Tape with Greater Dynamic Range-Alfred H . Moris 36

IJnitizecl Stereophonic Louclspeaker with Acoustically Augmented . . . . . Separation of the Sound Sources-Hawy F. Olson 40

A Study of SCA Interference in Stereo FM Receivers--Donald 1. Popp 45

A Report on the I'roposed NAii Disc and Playback Standard . . . . . . . . . . . . . . . . -John J. Bubbers 51

JIixing and Bridging Techiiiclues--Carltorz I?. IZ.'ood . . . . . . . 55

. . . . . . Lettersto theEditor 66 ShoppingtheAudioLIarket 90 . . . . . . . . Fall Convention, 1962 68 Section Meetings 92

. . . . Complete Convention Program 12 Membership Informati011 94

Fifteen Years of Audio Engineering Society Awards . . 9(1

EDITORIAL BOARD

Japan I Mnnaging Editor: JAGUUEI.INE HARVEY Associate Editor: ELIZARETH BRAIIII~T

Britislz Liaison British Sound Recording Association

London W. C. I , England

Address n~anuscripts and editorial correspondence to the Secretary, Audio En- gineering Society, Box 383, Madison Square Station, New York 10, N. Y. Mem- hership information and back copies may also be obtained from the Secretary.

I

J o u r n n l i l l tlie ittrlio T l :n~ i t r e~r inq B o c i ! ~ l ~ . T o l u m e 12, Number 1, J s n ~ r x r . ~ , L!lijS. Pnl~l ishei l qunr.(ei.ly 113 tiir Audio I < ~ i l ( i r i c ~ ~ ~ i n g Buciet,y atill sup- 1,Iitd to a l l r~lerltbcrs ill good s t : i ~ l d i n ~ . Pu1~i i c :~ t ion oflicc, 1 0 4 Lilierty S t ree t , TTt,icn, S . T. Rsccuii\.e ofice. 130s 383 , 3I:rdison Sq~r : i~ . e S t i ~ i i ~ l l . PIT?\\. Work 10 , N. T. IEr~tc.rcd ;IS s r e o ~ ~ d elass i n a t t ~ r at <,he post ollicc a t Utica, N. Y. Suh>cl.il,iiotis tmo nr1111ne~nt1,rrn. $11 PI. yn1r . (!r,~~yl.igi~t lg(5-I l ~ g tire Audio Eng inee r ing Sucicty. T h e J o u r n a l is llldexcd i n the Applied Science d T'ef'ir!auioy{/ I I I ~ P Z . .

Permission Lo r ep r in t , in wholc or in p a r t , rnaterinl or iginal ly al111earing in the .Tourn;*i nils st, 1 ~ p ohtaincd in rvr i t ing ft.otn the Secretary. The "Jou?nel of the Audio fln~ineering Society" and its cover design has becn registcreil :rs 2% t r a d e m a r k it1 t he Lilritcd S ta te s P a t e n 1 Ol'liee.

Journal of the

AU DIO ENGINEERING SOCIETY E s W@

I APRIL, 1964 VOLUME 12, NUMBER 2 OFFICERS F O R 1963-64

President FLOYD K. HARVEY

Executive Vice-President DANIEL W. MARTIN

Central Vice-Preside~t WILLIAM D. FINDLAY

Western Vice-President HUBERT W. PIERCE



BOARD OF GOVERNORS

R. T. BOZAK F. V. HUNT

COMMITTEE CHAIRMEN

Admissions-R. T. BOZAK Awards-H. H. SCOTT

Convention-DANIEL W. MARTIN Exhibits-JACQUELINE HARVEY

Finance-R. A. SCHLEGEL Historical-C. A. RACKEY

Laws B Resolutions-A. A. PULLEY Membership-D. R. YON RECKLINGHAUSEN

Nominations-H. E. ROYS Papers Procurement-RONALD D. KLUMPEN

Public R ~ ~ ~ ~ ~ O ~ S - J A C Q U E L I N E HARVEY Sections-EDWARD H. UECKE

Standards-WILLIAM H. MILTENBURG Sustaining Membership-H. SAMPSON, JR.

SECTIONS

Los Angeles San Francisco New York Midwest

Japan

British Liaison British Sound Recording Association

London W. C. 1, England

. . . The RCA Victor DYNAGROOVE System-Harry F. Olson 98

Psychoacoustics, the Determining Factor in Stereo Disc Recording . . . . . . -John E. Jacobs and Paul Wittman 115

Interrelation of Speaker and Amplifier Design-Victor Brociner and Daniel vo?z Recklinghausen . . . . . . . . . 124

Condenser Microphones with Electret Foil-G. M. Sessler . . . . . . . . . . . . . and 3. E. West 129

A Pilot Phase Monitor for FM Stereophonic Broadcasting . . . . . -J. Fleming Dias and Jouke Rypkema 132

Mechanical Damping in Tape Transports-John G. McKnight . . 140

Techniques in Processing Large Quantities of Audio Spectrum Analysis . . . Data-Mark R. Weiss and Cyril M. Harris 147

Linguistic Problems in Extraterrestrial Communications . . . . . . . . . . . -Russell F. JY. Smith 154

. . . . . Letters to the Editor 162 Membership Information 170

Section Meetings . . . 164 Sound Track . . 172

Shopping the Audio Market . 174

EDITORIAL BOARD

Managiilg Editor: JACQUELINE HARVEY Associate Editor: ELI~ABETH BRAHAM

Address manuscripts and editorial correspondence to the Secretary, Audio En- gineering Society, Box 383, Madison Square Station, New York 10, N. Y. Mem- bership information and back copies may also be obtained from the Secretary.

I

Journal of the Audio Zngineeriug Society, Volume 12, Number 2. April, 1964. Published quarterly by the Audio Engineering Society and supplied @lic!d to all members in good standing. Publication office, 104 Liberty Street, Utica, N. Y. Executive office, Box 383, Madison Square Station, New York 10, N. Y. Entered as second class matter a t the post office a t Utica, N. Y. Subscriptions to nonmembers, $11 per year. Copyright 1964 by the Audio Engineering Society. The Journal is indexed in the Applied Science d T e c h w l o g y Index .

Permission to reprint, in whole or in part, material originally appearing in the Journrsl must be obtained in writing from the Secretary. The ".Journal o f the Aud io Engineering Society" and its cover design has been registered as a trademark in the United States Patent Office.

Statement of Ownership and Management of Journal of the Audio Engineering Society. Owner: Audio Engineering Sooiety (a nonprofit organization), P.O. Box 383, Madison Square Station, New York 10, N. Y. Location of business office: 124 East 40 Street, New York 16, N. Y. Managing Editor: Jacquelirie Harvey, 124 East 40 St., New York 16, N. Y. Published a t 104 Liberty Street, Utica, N. Y. 13502. Frequency of issue: Quarterly January, April, July, October.

Journal of the

AU DI O ENGINEERING SOCIETY



Executive Vice-President DANIEL W. MARTIN

Central Vice-president WILLIAM D. FINDLAY

Western Vice-President HUBERT W. PIERCE

Secretary C. J . LEBEL


BOARD O F GOVERNORS

COMMITTEE CHAIRMEN


C~n~ention-DANlEL W. MARTIN Exhibits-JACQUELINE HARVEY

Finance-R. A. SCHLEGEL Historical-C. A. RACKEY

Laws B Resolutions-A. A. PULLEY Memberslzip-D. R, VON RECKLINGHAUSEN

Nominations-H. E. Rovs Papers Procurement-RONALD D. KLUMPEN

Public ~ e ~ a t i o n s - J ~ c ~ u ~ ~ 1 ~ ~ HARVEY Sections-EDWARD H. UECKE

Standards-WILLI~M H. MILTEXBURG Sustaining Membership-H. SAMPSON, JR.

SECTIONS


Japan



The M'estrex 3D StereoDisk System-C. S. Selson and J . T.V. Staflord . Parametric -4mplifiers Used in Electroacoustics. 2. The Condenser

Microphone Amplifier with Semiconductor Elements-Edmond . . . . . . . . . . . . . . . . . . . de2Friet

FhI Stereo Receiver Performance as a Function of Pilot Circuit De- sign-A. Csicsatka and R. Linz . . . . . . . . . .

A Preliminary Experiment on the Perceptual Basis for SIusical Instru- ment Families-Melville Clark, Jr., Paul T. Robertson and David Luce . . . . . . . . . . . . . . . . . .

Single-Ended Wide-Range Electrostatic Tweeters with High Efficiency . . . . . and Improved Dynamic Range-Keith 0. Johnson

On the Damping of Phonograph Styli-B. B. Bauer . , . . . a

Recording Aircraft Noise to 100 kc-'4. R.Soflel . . . . . . . Intermodulation Distortion Measurement-D, E. O'AV. PVaddi~zgton . The Measurement of Instailtaneous Speed Stability of Instrumenta-

tion-Type Magnetic Tape Transp3rt Systems-Dofnenic Bal- ducci . . . . . . . . . . . . . . . . . . . .

-4 Method for Raising the Load Capability of Stereo Cutters-Hayst Redlich and Hans-Joachim Klemp . . . . . . . . .

Trends in Loudspeaker Magnet Structure-R. J. Parker . . . . . An Electronic RIusic Studio for the Independent Composer-Gordon

. . . . . . . . . . . . . . . . . . . Mumma Functionalized Listening Facility for the i'Iultilingua1 Auditorium-

. . . . . . . . . . . . . . . . . D. D. Jones . . . . . A Successful Re-Slitter for Magnetic Tape--James H. P?,out

Spring Convention, 1964 . . 248 Sound Track . . . . . . Current Publications on Audio . 262 Section Meetings . . . . . 3'Iembership Information . . 264 Shopping the Audio SIarket . .

EDITORIAL BOARD

Managing Editor: JACQUELINE HARVEY Associate Editor: ELIZABETH BRAHAM


I

Journal of tile Audio Engineering Society, Volume 1 2 , No. 3, July, 1964. Published quarterly by the Audio Engineering Society and sup. pliod t o all members in good standing, Publication office, 104 Liberty Street, Utica, N. Y. Executive office, Box 383, Nadlson Square Station, Sew York 10 , N. Y. Entered as second class matter a t the post office at Utioe, N. S. Subscriptions to nonmembers, $11 per year. Copyright 1964 by the Audio Engineering Society. The Journal is indexed in the Applied Sc ience T e c h w l o g y I n d e x .

Permission to reprint, in whole or in part , material originally appearing in the Journal must be obtained in writing from the Secretary. The " J o u r n a l of the Audio Engineerino Societu" and its cover design has been registered as a trademark in the United States Patent Office.

Journal of the

AUDIO ENGINEERING SOCIETY



Executive Vice-president DANIEL W. MARTIN

Central Vice-President WlLLlAbl D, FINDLAY

Western Vice-Presidegtt HUBERT W. PIERCE



BOARD O F GOVERNORS

COMMITTEE CHAIRMEN


C O ~ V ~ ~ ~ ~ O ~ - D A N ~ E L W. MARTIN E X ~ ~ ~ ~ ~ S - J A C Q U E L I N E HARVEY

Finafzce-R. A. SCHLECEL Historical-C. A. RACKEY

Lazos B Resolzctions-A. A. PULLEY Members/zip-D. R. VON RECKLINGHAUSEN

Nominations-H, E. ROYS Papers Procz~rentent-RONALD D. KLUMPEN

Ptrblic R e l a t i o n s - J 4 c o u ~ ~ r ~ ~ HARVEY Secti0f~~-EDWARD H. UECKE

Standards-WILLIAM H. MILTENBURG Sustaining Memberslzip-H. SA~IPSON, JR.

SECTIONS


Japan



Performance and Reliability Requirements for a Master Tape Recorder -Reifz Sa rma and TV. -11. F z ~ j i i . . . . . . . .

Soise Limitations in Tape Reproducers-Erling P. Skov . . . .

Dynamic Range Limitations in Tape Recording-Robert Z. La~zgeoin

Advanced Tape Mastering System: Electronic Features -John T . Mullin . . . . . . . . . .

Advanced Tape Mastering System: Mechanical Features-K. Clzbnis .

Techniques for Achieving Wide Dynamic Range in Magnetic Recorders -Keith 0. Johnson, . . . . . . . . . . .

On Tracking and Tracing Error JIeasurement-Duune H. Cooper , ,

X Kew Multi-Decli Broadcast Audio Tape Cartridge System . . . . . . . . . -K. Rey Smith I I

. . . . . 4 Custom Studio Recording Console-LVilZiam G. Dillcy

Spoken Digit Recognizer for the Japanese Language Kuniichi r aga ta , I'aszro Kato and Seibi Chiba . . .

Letters to the Editor , , . 344 Shopping the.AudioilIart . . 358

. . . . . . Sound Track 350 AIembership Information . . 360

. . . . . . Current Publications on Audio 352 I n IIemoriam 362 . . . . . . . . . Section Meeting Reports . 354 Index 363

EDITORIAL BOARD

Managing Editor: JACVUELINE HARVEY Associate Editor: ELIZABETH BRAHAM

Address manuscripts and editorial correspondence to the Secrexary, Audio En- gineering Society, Box 383, Madison Square Station, New York 10, N, Y. hlembership information and back copies may also be obtained from the Secretary.

-. Journa l o i the Audio Engineering Society, 'Volume 12. KO. 4, October, 1961. Published q u a r t e ~ l ? by the .'itdio Engineering Society and sup- plivd to all members in good standing. Publication office, 1 0 4 Liberty Street, Utica, S. Y. Executive office, B o s 3 e 3 , l ladison Square Station. ?;ew York 10. N. I-'. Entered as second class matter a t the post office a t C t ~ c a , N. Y. Subscriptions - to ~ nonmembers, $11 per year. Copyright 1964 by the Audio Engineering Society. The Journal is indexed in the Applied Science a? Techmluyy Index.

Perlnission to reprint, In whole or in part , material originally appearing in the Journal must be obtained in writing from the Secretary. The "Journal oi the duclio Enoineering S o c i e t ~ " and its cover design has been registered as a trademark in the United States Patent Office.

Journal of the

O F F I C E R S FOR 1964-65

Presidi>+rt I ) A N ~ R L W . MARTIN Execut ive I'ice-l'vrsirlent k11;GH S. KNO\\I.F.S Ceslrcrl V ice - I ' r e s i r l e~ t EIIWIN M. W-EKK I17asti>vn l ' ice-Prrs ideat WILI I A \ I 1,. I i o n ~ x s o ~ Seo-etfivy C. J . I,KKI;L I'l.cusllrc~1. RAI.PJT .A. S(:III.EGRI.

BOARD OF G O V E R N O R S

13. T. I ' r 0 / 4 ~

F. A. C o \ r r ~ i 1

F. k. H A I ~ \ I I " I I , . . ~ O L I

W . 11. MII i ~ u n u ~ i i , It . C. Mol L I ~

11. F. 01 soh H. L. H o l 5 H. H. S c o ~ r I. C. W o o r ~ \ \ qilr)

COh4MITlEE CHAIRMEN

,-ld~izis.siorts-K. 'I'. K O Z A K rl zc~clrds-EI. E. Rovs Eslzibits-J . Hn~vlc\. Pucilit ies-K. O. KLI:\II'FI\I Pull Cowvent ion-I i . S. KNOWI.ES Piaunce-K. A . SCJ II.I<~:I<I. I1istor.irai-A. A . PLJI,I.EI- Lazas B R~so ln t io r z s -H. F . OI.SON MrtnDevship-J. (;. Woouwn~c~) i l iomii~utiojts-F. K. HAI~YEY Pzcbiic Reirrtions-.I. HAI~\I:Y Sectioj1.s-I. L. Ju~ir. Spring Coitve+rtio?r-W. 1,. RUI{INSON Stnnrlards-F. C. (:o\l~.tic:r Slcstairzi~tp 1Ibe~tz6ersl1ips-R. (:. h l o ~ ~ l i

SECTIONS

Japan - I,os Angeles - Atidnest Nem York . San Francisco

Bt ztislt Liriison

I'rritish Sound Recording Association, 1,ondon W. C. 1 , England

A idow-Noise 'I'ransistorized 'l'aj)e Playbacli Arnl~liiirr- . l a ~ ? ~ s J . 1)avid.con . . . . . . . . . . . . . . . .

Circuits of 'Transistorized KP Condenser 3 l ic ro lhones~- . . . . . . . . . . . . . . . A a n s Joarhiv~,~ Gricsc

-4 Survey of f'erforrnance Ke(~uircments and Llesign Techniques for Highest Quality FM h1ultiplex Reception--F. L. Alercyt~cr . .

Design C'onsiderations for Silicon 'rr$nsistol\ ill A31 'Fhl Jlultiplc\ Receivers-/(. I;. I;ourt~ic~r and li. T. Peterson . . . . . .

h Alinin~um Kider C'ircuit for Noise Irnm~ini t ) in a Stereo P h l . . . . 1)emodulator-Lcslic Golonvki . . . . .

A 'I 'e~hnical ('ontribution to I'erlnit the Addition of Stereo to Alas5 i\larket FA1 Keceivers- .4 ( ' s i c ~ a f k a t r ~ z d I ( . ill L ~ i l s .

1))rnarnic Range I'roblerns in 'L'ransistori~cd PLI Keceivers--J. H . Srhultz

History and Current Status of Miniature Varinble-Reluct;i~~cc Balanced- . . . . . . A 4 r ~ ~ ~ a t ~ t r r Transtlucers--Richard CI'. C'trrlislc

I'recision I'erformance hleasurements on a Ke~v Sound Kccorcling 'I'ajx . . . . . . . . . . . . . . . . - -Joseph I<entplcr

An Ol~t ical Aid for Designing Loudspeaker ('lu5lrrs -

. . . . . T I il/rcil '4. ~l ln ln~ lz t t id nwd Ewart 1. I l i ~ ~ t h ~ ~ r z l l

Low-Frequency Iiesponse and I<fficienc y Kelationships in Direct- . . . . Radiator 1,oudsllraltel Syitcms-Roy F . .Illz~on

T h e Brandeis Cniversity Elec t ~ o n i c AIusic Studio R o b c r t 1Vf. T'osi

Fall Convention, 1964 . . . 70 Sound Tracl; . . . . . . C'o~npletc C'onvention J'rogram . 76 I\lemhership Information . . . Shopping the A ~ ~ d i o hlarket . . 91 Section Aleeting5 . . . .

E D I T O R I A L B O A R D

Munuging Ed i to r : JALQURLINE HARVEY r Z ~ ~ o ~ i a t e Ed i to r : ELIZABFIH BRAHAM

Address manuscripts and editorial correspondence tn the Secretary, Audio Rn- gineering Society, Box 383, Madison Square Station, N e w York 10, N. Y. Mem- bership information and back copies may also be obtained frorn the Secretary.

J ( I I I ~ I I ; I I o f tli(: 111(Iiiy P:!~gi~~rvrin: So(:i~l,y. VOIII I I I~ , 13. Xu. 1, z T : ~ ~ ~ u ~ ~ ; ~ r y , l9(;5. I P ~ i t ~ I ~ s l ~ i ~ d C ~ I L : I ~ { ~ I . ~ ~ 11y ~ I I ( \ .41111it1 l + ; ~ ~ g i ~ ~ ~ ~ c , r i ~ ~ x Sr~ri ,! l~ ; I I I ( I S I L ] > -

yliod to all lnenlbers i n good standing. Publication office, 104 Liberty Street, Utica, N. Y . Eseeutire office: Rux 383, M ~ L ~ I S O I I Sq11:li.e dtntior~. Nerv York 10, N. IT. Entered a s scco~ld class lnatter at the post office a t Utica, N. f. Subscriptions to nonmemhcrs, $11 pel. year. Copyright 1964 by the Audio Engineering Society. The Journa l is indexer1 i n the A p p l i e d Science & il 'schmloyy I T L ~ ~ Z Z .

Permission to reprint , in whole or in part, material originally nppearing in the Journa l rnust be obtained in writ ing t ram the Secretary. The ".lournnl of tlre Aud io Eng ineer ing Rociety" and its cover ilesien lias been reg is t~red as a t.rademark in the Tinited States Patent Office.

S t :~Lel lc~i t of Oti.?it.l-hil~ :inrl ;Ll:i~~:ry,ciiln~t of ]iriu.i>:il ui the .\u(Lio R ~ l ~ i t t e ~ r ~ n g Soviet?. 0w11n-: L \ ~ ~ d i ~ i I'.t~ginccrit~g Society (:r Ilonpr<! ,, ~ ~ r y , a ~ ~ i z : r t i < , n ) : l'.O. 1 3 ~ 1 s . : t i: , hI:~d.,sor~ SCILI:II-? S ~ : I ~ ~ ( J I I . N?\v \-<)~-lc 10. S. \-, 1 2 c r : ~ t i r ~ ~ ~ cjt 1,1rhi11e,s ~Sl ic? : 124 k:a\t 40 S t ~ . c c t , N c n YOI-I< 16, N, Y. J I , ~ n ; i g i ~ ~ g E,Iiiu~-. J ; L C C ~ I I C ~ ~ ~ I ~ Ilar\.cy. 12-1 I':l,t 40 St., RTiw \'o~-l; 10, N. \. IYuiili\l~cil . ~ t 1114 I . i l~c r iy Strcel, i7 i icn , N. V. 13.332, Yl-eclucnrp o i i-quc: Qaarierlv J;nulan-y, A ~ I - i l , J u l y . Ortol~cl-

- Journal of the

AU DIO ENGINEERING SOCIETY ES,


President DANIEL W. MARTIN Executive Vice-president HUGH S. KNOWLES Cetltral Vice-President EDWIN M. WEBB Westera Vice-President WILLIA~I L. ROBINSON Secretary C. J. LEBEL Treasures RALPH A. SCHLEGEL

BOARD O F GOVERNORS

COMMITTEE CHAIRMEN

Admissioas-R. T. Boz .4~ Awards-H. E. ROYS Exhibits-J. H A R ~ Y Facilities-R. D. KLUMPEN Fal l Cottvention-H. S. KNOWLES Finaizce-R. A. SCHLEGEL Historical-A. A. PULLEY Laws B Resolutions-H. F. OLSON Membership-J. G. WOODWARD Nominations-F. K. HARVEY Public Relations-J. HARVEY Sections-I. L. JOEL Spring Convention-R'. L. ROBIKSON Sta,ldard~-F. C . C O ~ ~ E R C I Sustaining Memberships-R. C. MOVER

SECTIONS

Japan . Los Angeles Midwest New York San Francisco

British Liaison

British Sound Recording Association, London W. C. 1, England

L\coustical Considerations Concerning Eew Tork State Theater- . . . . . . . . . . . . . . b'ilhell~z Lassen Jordan

The Sound System a t the New York State Theater- Irvi~zg W. Wood and Joel S , Fichnzan . . . . . . . . .

-4 New Method of Disc Recording for Reproduction with Reduced Dis- tortion: The Tracing simulator-Horst Redlich afzd Hans- Joachim Klemp . . . . . . . . . . . . . . . .

The Response of Loudspeakers to Tone Bursts-Victor J . Kanzinsky . Electrical Loading Ketworks for Stereo Phonograph Cartridge Trans-

. . . . . . . . . . . . . ducers-Philip Kantrowitz

Design and Use of Recording Styli--Richard Marcucci . . . . . . An Improved Disc for Master Recording-John E. Jackson . . . . Interaction of Tracing and Tracking Error-Duane H. Cooper . . . An Integrated Electronic IIusic Console-L. A . Hiller, Jr . . . . . . Intensities of Orchestral Instrument Scales Played a t Prescribed Dy-

namic hlarkings-Melville Clark and David Luce . . . . . On the Phase Mismatch of a Stereophonic Signal-J. Fleming Dias . . Record Contamination: Causes and Cure-Percy Wilson . . . .

Letters to the Editor . . . 182 Sound Track . . . . . . l len~bershipInformation . . 184 Sectioni\Ieetings . . . . .

Shopping the Audio Market . 190

EDITORIAL BOARD

WILLIAM S. BACHMAN DAVID L. KLEPPER H. E. ROYS FRANK C. COMERCI C. J. LEBEL EDWARD SCHMIDT HELLMUTH ETZOLD JOHN G. MCKNIGHT D. R. VON RECKLINGHAUSEN FLOYD K. HARVEY HARRY F. OLSON SHELDON I. WILPON CLYDE R. KEITH N. C . PICKERING J. G. WOODWARD

Managing Editor: JACQGELINE HAR\EI

Associate Editors: ELIZABETH BRAHARI and SUSAN M. LUTZ


I

Journal of the Audio Engineering Soeietv. Volume 13 . No. 2, April, 1965. Published quarterly by the Audio Engineering Societv and sup. plied to all members in good standing. ~ubl icat Ion office, 104 Liberty Street, Utica, N. Y . Executire office, Box 383, Madison Square Station,'New York 1 0 , S. T. Entered as second class matter at the post office a t Utica, N. Y. Subscriptions to nonmembers, $11 per year. Copyright 1965 by the Audio Engineering Society. The Journal is indexed in the App l i ed S c i e n c e d2 !Tech%olooy Indez.

Permission to reprint, in whole or in part, material originally appearing in the Journal must be obtained in writing from the Secretary. The "Jou~nal o f t he A u d i o E n g i n e e r i n g Socie ty" and its cover design has been registered as a trademark in the United States Patent Office.

1

- Journal of the

AU DI O ENGINEERING SOCIETY


President DANIEL W. MARTIN Executive Vice-President HUGH S. KNOWLES Central Yice-President EDWIN M. WEBB Western Vice-president WILLIA?~~ L. ROB~~-SON Secretary

Treasurer RALPH A. SCHLEGEL

BOARD O F GOVERNORS

R. T. BOZAK F. A. COMERCI F. K. HARVEY I. L. JOEL W. H. M~LTENBURC R. C. MOVER H. F. O ~ s o i i H. E. ROYS H. H. SCOTT J. G. WOODWARD

COMMITTEE CHAIRMEN

Ad?nissio~zs-R. T. E o z m Awards-H. E. ROYS Exhibits-J. H A R ~ Y Facilities-R. D. KLU~IPEN Fall Convention-H. S. KNOWLES Finance-R. A. SCHLEGEL Historical (Acting)-JOHK D. COLTIN Laws d Resolutions-H. F. OLSON Membership-J. G. WOODWARD !Vominatiofzs-F. K. HARVEY Pz~blic Relations-J. HARVEY Sections-I. L. JOEL Sprisg Conveatio?z-W. L. ROBINSON Standards-F. C. COMERCI Sustailting ~Mentberships-R. C. MOVER

SECTIONS

Japan Los Angeles Midwest New York . San Francisco

British Liaison

British Sound Recording Association, London W. C. 1, England

ARTICLES

Duration of .4ttack Transients of Sonpercussive Orchestral Instru- nieats-David Luce and Melville Clark, J r . . . . . . . .

Voltage Controlled Electronic Music llodules-Robert A . Moog . . Transistor filicrophone-&I. E. Sikorski . . . , , . , . . . The Use of Noise Cancellation in Modern Telephone Practice and De-

sign-Gaston. A. Marchand . . . . . . . . . . . X 200 Watt Solid State Stereo .4rnplif1er-~Madatt h1. Shal,nza . . , . High-Power, Low-Frequency Loudspeakers-John K . Hilliard . , . The Sound System for the 1964 Tokyo 01~-mpics-Takeshi Itow . . Construction of Tracing Correlator Waveforms-Duane H . Cooper

Techniques for Measuring the Vertical Tracking Angle of Stereophonic Phonograph Pickups-J. G. IVoodwa~d . . . . . . . .

The New T-AB Tape Standards-George Bartlett . . . . . , .

DEPARTMENTS

Spring Convention, 1965 , . 254 Section Meetings . . . . . 276

Complete Convention Program 258 lIenlbership Information . . 280

Obituaries . , , . . 268 & 2 7 0 Sound Track . . . . , . 285

LetterstotheEditor . , . . 2 7 2 Shopping the .Audio 3larket . 286

EDITORIAL BOARD

Mana~ ing Editor: JACQUELINE HARIEY

Associate Editors: EI~IZABETH BRA HA\^ and S U S ~ N %I. LUTZ

Address manuscripts and editorial correspondence to Editorial Offices, Audio Engineering Society, 124 East 40th Street, New York, N, Y, 10016. Membership information and back copies may also be obtained at this office.

Jonr~.n l of the dudio Kiigineeying Sociei7-. 7-olume 13. S o , 3, July, 1965. Pnl~lisliecl q~~nr tevly by tile .Audio En~ inee r inp Society and sng- plied t o nil members in good standing. ~ub l i c a t i bn office. 104 Liberty Street, Vtica, K. T. Execu t i~e office, BOX 383, Xadison Square Station, New York 1 0 , K. T. ' Entered a s second class matter a t tile post office at Utice, 1. Y. Subscriptions t o nonmembers, $11 per year. Copyright 1965 by the Audio Engineering Society. The Journal is indexed in the App l i ed S c i e n c e d lechlaoloyl i Iq tdez .

Permissloll io re l~r in t , in ~r.hole or In par t , ~naterial origillally appearing 111 the Jo~u.na1 must be obtained in writing fso,!n the Edisovial Office. The " J o u r n a l of t i l e Bztdio Eng i%eer ing Soc i e t?~ ' ' and its cover design hae been registered as a trademark i n the United States Patent Office.

Journal of the

AU D l 0 ENGINEERING SOCIETY

OFEICERS F O R 1964-65

President DANIEL W. MARTIN Executive Vice-President HUGH S. KNOWLES Central Vice-President EDWIN M. WEBB Western Vice-President WILLIAM L. ROBIMON Secretary

Treasurer RALPH A. SCHLEGEL

BOARD O F G O V E R N O R S

C O M M I T T E E CHAIRMEN

Adnzissions-R. T . B024~ Awards-H. E . Roys Exhibits-J. HARVEY Facilities-R. D. KLU\IPEN Fall Convention-H. S. KNOWLES Finance-R. A. SCHLECEL Historical ( A c t i t z g ) - J ~ ~ s P). COL\ IK

Laws d Resolutions-H. F. OLSON .Membership-J. G. W O O D ~ ~ A R D Nominations-F. K. H A R ~ E Y Public Relations-J. H A R ~ E Y Sections-I. L. JOEL Spring Convention-W. L. ROBINSON Standards-F. C . COMERCI Sttstaining Memberships-R. C . MOYER

SECTIONS

Japan . Los Angeles Midwest New York * San Francisco

British Liaison British Sound Recording Association, London W . C. 1, England

I ARTICLES

Calibration of 1Iicrophones. Vibration Pickups, and Earphones- Richard K . Cook, Seymour Edelllzaa aizd Td'alter Koidan . .

A Procedure for Controlling Room-Ring LIorles and Feedback l lodes in Sound Systems with Narrow-Band Filters-C. P. Bonrr af2d C. R. Boner . . . . , . . , . . . . . .

I m ~ r o ~ i n p Headphone Listening Comfort-5. B. Buz~er. . . . . . An Inertial, Tissue-Contact Type llicrophone-Reproducer Lnit for

Deep Submergence Communications-G. J . Sebesta, A . J. 12fellen, .4. Hojer and R . 14.. Carlisle . . . . . . . . .

Passive and Active Acoustics in Architectural Enclosures- Harry F. Olson . . . . . . . . . . . . . . . . .

Power Bandwidth, Frequency Respon.je, and 1Iusic Spectra- T'ictor Brociner . . . . . . . . . . . . . . . .

Transient Response and Phase Equalization in Jlagnetic Recorders- Keith 0 Johnson and D . P. Gregg . , . . . . . .

-1 Yew Solid State Amplifier for Studio and Broadcast Use- Tl'zlliav? G. Dille?~ . . . . . . . . . . . . . .

A Program Distortion lon nit or-Joseph H . Dessen . . . . .

DEPARTMENTS

. . . . Letters to the Editor 350 Shopping the .Audio llarliet 370

Kews of the Sections . 362 Sound Track . . . . . 3 7 2

Ale~nbership Infor~nation . . 366 Indev to TTolume 13 . . 379

Product Highlights of the 1965 Fall Convention . . 374

E D I T O R I A L B O A R D

Manngilzg Editor: JACQUELINE HARIEY

Associade Editors: ELIZABETH BRAHAM and suss^ M. LUTZ

Address manuscripts and editorial correspondence to Editorial Offices, Audio Engineering Society, 124 East 40th Street, New York, N. Y. 10016. Membership information and back copies may also be obtained at this oflice.

plied to all members in good standing. publ ica t ion office, 104 Liberty Street, Utioa, K. Y. Executive office, BOX 383, JIadison Square Statlon, S e w Yorlc 1 0 , N. T. Entered a s ~ecol ld class lnatter a t the post office a t Utica, N. Y. Subscriptions to nonmembers, $11 per year. Copyrigllt 1 9 6 5 bp the Audio Engineering Society. The Journa l is indexed in the A p p l i e d Science ,& Technologv Indez.

Permission ra rellrint, in rvl~ole or In part , material origil~ally appearing In the Journal mu5t be obtained in writing from the Editorial Oflice. The "Journal of the Audio Engineering Societw" and its cover design h a s been registered as a trademark in the United States Pa tent Office.

Statement oi On.nershiI~ nr?ci 3I;lnage1uent oi Jour~la l o i the Audio Engineering Society. OI\-ner: .\udio Eiigi~leer~ng. Suc:ety (a nonprofit organizat ion) . P.0. BOX 38.1, 3Iadiso11 Square Station. S e w York II!, S. \I. Location oi b .~ i iness oi3ce: 124 Eai t 40 St-eet , S e w Yorli 16. S Y. 1I:~tlagin~ Editor: Jacq~ielirle Harvey. 124 East 40 St., Sen. York 16, K. I'. P:lblial~ed a t 1L'i L~l>e . . t~- Street, Utica, S. Y. 13502. I2rrqcencY o[ iqsue: Quartel-13- Jclluarv. Apri;, J u l ) , October.

Journal of the


OFFICERS F O R 1465-66 Prusidenl HLCH S. KNOWLLS Exer ut ive Vire-1'1 esident T)AYIPI. 11. \ O N RECKLINGI~AUSFN

Central Vice-l'restdest .IUSEPH F. WI?I,I~S Western Vice-President D~Wrrr F . MORRIS

HOARD OF GOVERNORS PRANK A. C:OMEIICI liLO31> K. HARVEY DANIEJ. W. MARLIN R O B ~ R ~ C. MOYEK .JOI I u 7'. MULI IN

H ~ K K Y F. OLSON REIN NARMA MI NRY E. KO\ s WII ~ 1 4 x 1 H. THUXIAS Jorru G. WOODWARD

COMMITTEE CHAIRMEN Admissions-J. D. COLLIN A wavrlv-F. K. HARVI*S~ Exhibits-.I. J3~awu Fall Corzveiitio+t-D. K. \ O N

REC.KI.INGIIAUSEN Finatzce-R. A. Scrrr FGEL

Historical-J. D. COLVIN J,urr,s 6 Kesolufions-H. F . OLSON Metabership-J. G. WOODWA~D Nontinntions-D. W. MARTIN Public K elation \-J. HAR\EY Sections-E. P. V I N C F P ~ ~ Spring Convention-D. F. Mo~rtrs Slo?~dalrls-F. A. CO~IERCI Sustaining ,I/lernbe~s/tips--K. C. Mowrt

SECTIONS Japan Los Angeles Midwest N e w York San Francisco Washington

B~itizlz Liaison British Sound Recording Association, Idondon W. C. 1, England

ARTICLES

. . . . . . . Dropouts a t Lovvl'a1)e Speeds -Frc~rzfi il. Cowzerci 2 Continuous Ilelay Regulator for ('ontrolling Recording Fhrors -

. . . . . . . . . . . . . . . . Duarce H, Cooper 7 An All-FORTRAN Music-Generating Computer Program--

. . . . . . . . . . . . . . . . . t l r f h ~ ~ r h'ojerts 17

A Program for the Keal-Time Generation of hlusical Sounds---- . . . . . . . . . . . . . . . . . Robert IC. Clark 2 1

A Seminar in Electronic Music. Composition-Kerh~rt A , Deufsch . . 30 . . . l'rotectio~~ Against Shock and Vibratioa-- Mahlon D. Bztrkhard 32

The Allethod arlcl Meaning of Acoustical Mcasurernent of Telephonic . . . . . . . . . Tra~~smilters-Gaston A . Mar, haild 39

Real Voice h1icrol)l~one Calibration as ;L 1Jtility Laboratory Method- IVillianz H. Snnv) . . . . . . . . . . . . . . . . 43

Self-CaIibrating Conclenser Ilicrophones with Integrated r-I Circuitry for Acoustical Neasr~rements--1Iatzs Jourhim G r i e s ~ . . 47

A Simple, Accurate Auclio Method of Battcry Cortditiorl Measurerneat- . . . . . . . . . . . . . . . . . Yates $1. Houg 50

Solid Stat? R-C Oscillator L)esign lor Audio Use--Robert E. Owe~z . 53

. . . . . . . Fall Convention, 1965 . . . 58 Sound Track 88 . . . . . Complete Convention Program 64 Available Literature 89

1,ettersto theEditor . , . . 80 NlembcrshipInEorrnatiol~. . , 90 . . . . . . News of the Sections 84 Shopping the Audio Marltet 93

Obituarie?. . . . . . . . 96

EDITORIAL HOARD

hdi tor : I ~ A R R Y F . O I W N Managinp Edilor: JALQUEI INB HARIJLY

Assoriate Edi tots: E ~ I Z A ~ ~ E T H BRAHAM, SWAN ht. LU'IZ, and JAN^ E. GAL~NTS

Manuscripts, editorial and advertising correspondence should be sent to Edi- torial Offices, Audio Engineering Society Journal, 124 East 40th Street, N e w York 10016. Address all other S o c i e t ~ husiness to the Audio Engineering Society, Box 383, Madison Square Station, N e w York 10010. Membership informr~tion and back copies may he obtained from either office.

I . l o u n ~ n l of tlle Audio Engineering Society. Volume 7 1 , No. 1, J a n u a r y 1 B i i t i . Published qrrnr.terlp by the Audio lcngineering Society a n d supplied :L. i n good Pubiii:a{ion oflicc. 104 1,il)erty ~ t r e c ' l , Iltica, N . Y. J<seculive oflice, r$ox :jir:3, &~:LIIISOII S r ( ~ l a ~ ' e Stiltion, N e 7 ~ York :LO, hr. \I. lGlltored a s secolld clnis ~ i l a t t c ~ . a t the post, office at Llt ir ;~, N. 17. Suhscr i l~ t ions to n o l l r n e ~ ~ ~ b c r s , $11 11rr y(2a.r. Copyright I9Gti hg tile Audio Rnginueriny Society. l ' h c ,Journal is intlc~scd i n Lire App l i ed Sciemcc (8 Il'ri~lrnulu.rl!~ 1nde.r. TIle Jourrlul lllo A&ucllo ~ , 1 g ~ , , c e r i l l g sociply hel.cl,y gl.nnls pcr.missio~r to ~ .c l j r i t~ t l n ]pal.r. ;nl.\' ~ ) ; l p e r ill this jbsur, i f i l i~cci . 1~1-l.rrlissiori is oblainrd J't.orri i t s nutkror ( P ) and credit is f i i i ~ l ~ to lllr : I I I / ~ L ~ ~ I ~ ( S ) an11 this ,iorrrnnl. A11 aulllor, 07 Ills reae;rv("n nflilitbte ma:, r e ~ l l ~ o l i u l ~ o his pa]loI' ill 1'1111 c~e t~ i t . i l l f this ,journal. This permisqion is not nsaigl~nble. ,rile " ~ ~ ~ ~ n < ~ l , the At,,lio Engineering rqoeiety" a n d i ts cover design h a s been registered a s a tr:rdemarl; in tile Unilrd States Patent Oflice.

Journal of the

A U Dl0 ENGINEERING SOCIETY

OFFICERS FOR 1965-66 President HTJGH S. KNOWLFS Executive Vice-President J ) A N I ~ L R. % O N RECKLINGH~USFN East ern Vice- Presiden t IRVING L. JOEL Central Vice-President .JOSEPH F. WELLS Western Vice-President D ~ w l r T F. MORRIS Secretary JOHN D. COLVIN Treasurer RALPH A. SCIILEGEL

BOARD OF GOVEKNCIRS FRANK A. COMERCI FLOYD K. HARVEY DANIEL W. MARTIN ROBERT C. MOYER JOHN T. MULI.IN HARRY F. OLSON REIN NARMA HENRY E. ROYS W I L L ~ A ~ V ~ EI. Trroivras JOHN G. WOODWARD

COMMITTEE CHAIRMEN Admissions-J. D. COLVIN Awards-F. K. HARVEY Exhibits-J. HARVEY Fall Convention-D. R. T O N

RECKLINGHAUSEN Finance-R. A. SCHLEGEL Histot i c a C J . D. COLVIN Lams 8 Resolutions-H. F. OLSON ililembership-J. G. WOODWARD Nominations-L). W. M ~ R T I N Pzlblic Relations-J. HARVEY Sections-E. P. VINCENT Spring Conventio~z-D. F. MORRIS Standards-F. A. COMERCI Sustaining Memberships-R. C. MOYER

SECTIONS Japan Los Angeles * Midwest New York San Francisco Washington

British Liaison British Sound Recording Association, London W. C. 1, England

ARTICLES

Acousti-Architectural Considerations in the Harris County Domed Stadium---F. Talbof Miilson . . . . . . . . .

Acoustical Design Considerations of the Houston Astrodome Sports Arena-T. J. Schultz . . . . . . . . . . . . .

Equalization of the Sound System in the Harris County Donled Stadium -C. P. Boner and C. R. bone^ . . . . . . . . .

Sound Systems for Orchestra and Grand Opera-1.eo L. Beranck . . Field Effect '~ransistors in Audio Preamplifiers-Bonald L. lYoliesen

High Quality 3licrophone Amplifiers for Professional Applications Using FETs--W. A. Rheinjelder . . . . . . . . . . .

Miniature Batteries for Miniaturized Applications-Joxph L, Dalfonso

Performance Measurement on Ear-Level Hearing Aids-- S. F . Lyharge~

. . . . . Duration and Frecluency Alteration--WiZlia71~ S. ~Lla~lens

Experimental Music with the Subharmonic Sound Apparatus "Subharchordn-G'e~hard Steinke . . . . . . . . . .

Optomizing the Dynamic Characteristics of a Phonograph Pickup- C. R. Anderson, J. H. Kogen, and R. S. Salnsolz . . . .

. . . . . . . . Stylus Mass and Elliptical Points---Joha Walton

DEPARTMENTS

Letters to t h e E d i t o r . . . 160 Membership Information , . Available ~~~~~~~~~~e . . . 180 Sound Track . . . . . . News of the Sections . . 184 Shopping the Audio illarket .

Product Highlights of the 1966 Spring Convention . . 172

EDITORIAL BOARD

Editor: HARRY F. OLSON Managing Editor: JACQUFLINE HARVEY

Associate Editors: ELIZABETH BRAHAM, SUSAN M. LUTZ, and JANE E. GAKNES

Manuscripts, editorial and advertising correspondence should be sent to Edi- torial Offices, Audio Engineering Society Journal, 124 East 40th Street, New York 10016. Address all other Society business to the Audio Engineering Society, Box 383, Madison Square Station, New York 10010. Membership information and back copies may be obtained from either office.

,Tournal of the Audio Engineering Society. Volrune 14, No. 2 , April, 1966. Published quarterly by the Audio Bng inee r in~ Society and supplied to all mainbers i n good standing. Publication office, 104 Liherty Street, Ulica, N. Y. Executive office, Box 383, Madison Square Station, Nev Porli 10, N. Y. Entered as second class n~at ter a t the yost ofice at Utica, N. Y. Subscriptions to nonmembers, $11 per year. Oopyright 1966 hp the Audio Engineering Society. Tbe Journal is indexcd in the Applied Sciertce d Technology Index. The Journal of the Audio Engineering Society hereby grants permission to reprint in part , any paper in this issue if direct permission is obtained from its aulhor(s) and credit is given ho the a u t i ~ o r ( s ) and this jouruai. An author, or his research affiliate may reprorluce his paper in full crediting this journal. This permission is not assignable. The "Journal of the Audio Engineering Societu" and its cover design has been registered as a Lrademark in the [Jniled States Patent Office.

4&3&&3 1

Journal of the


OFFICERS FOR 1965-66 P r e ~ i d e n t HUGH S. KP\IOTVLES Eseczctive Yzce-Ptesideat D ~ ~ I E L R. v 0 1 RECKLIICHJCSEA. Easterta T'tce-PI esident IKVI\L L. JOEL Cent2 al T. i c e - P r e ~ i d r n t JOSEPH F. WEII I Cb'esterft Vice-Presiden t 13~b ITT F. htonnrs Secretary J O H X D, COLVIN Treasurer RALPH A. SCHLEGEL

BOARD O F GO\'FRNORS FRANK A. COMERCI FLOYD K. HARVEY D A l l E L W. MART!> ROBERT C. MOYER JUHN T. MULLIN HARRY F, OLSOW REIY KARMA HEKKY E. ROYS \ V I L L ~ ~ M H. THOWE 3 0 ~ ' . 'u. WOOD= 4RD

COMMITTEE CHAIRMEN A dntissiotzs-J. 19. COLX IN A wards-F. K. HAI<\E\

Eshibits-J, H ~ R P E Y Fnll Convention-D. R. \or;

R E C K L I ~ G H A D S E ~ Finance-R. A. SCHLEGEL Historical-J. D. COLVIN Lows t3 Resolutions-H, F. OLSOX .Memhel-ship-J. G. \ ~ O O D W A R D

Nominntiotas-D. W. MARTIS PzcbEic Relations-J. HARVEY Secfions-E. P . VINCENT Spring Co?zventin?t--D. F. MORRIS

ARTICLES

Lix e -1nnoun~en-ient R e ~ o r d - K r l ~ r o d u ~ e Fdcilitie, Lo1 -%irpor~ Audio . . . . . . Communication Systerns-Robelt C' Cofcrn

Behavior of Sound System Response Immediateby ReIo~v Feedback- C. P. Boner and C , K . Boner- . . . . . . .

Behind the .1ctor's Uacl~-1~czuid I-. Kleppcr-'" . . . . . . . .

. . . . . Deformation Distortion in Disc Records-Tak~o Shiga

Absolute Calibration of I'ickups and Records---A. Schze~ar-tz, A . .I. Gust, and R. R. Razw . . . . . . . . . . . . . .

The CBS Type 8A Field Audio Console--E. S. Ka~~~zorzd* . . . .

Human Integration of Concurrent &kudio and 1-isual 3Iessage- Donald B, i2ec.o~ . . . . . . . . . . . . . . .

Research Towards a High Efliciency I7oice Communication System- Barry F. Olsolz, Herbert Belar-, and Edwarcl S. Rogers . ~ ~

-4 Low-Koise Condenser- hlicrophone---A. K . Sofiel* . . . . T~~-o-'i'i'ay Cardioid Microphone-R. Ll'cingart~zer . . . . . . .

The Application of Reverberant Field l\leasurenients to the Evaluation of Loudspeakers and l\licrophones--1)n~1i~l Queen . . . .

-1 Solid State High Frequency Compression Horn-Hura Schafft" .

DEPARTMENTS

Letters to the Editor . 264 I\lernber>hil~ Information 281 Spring Convention. 1966 . 268 S e w s of the Sections . . 290 I'omplete Conr-ention Program 272 Shoppinq the Audio Market 291

-1vailable Literature . . . . 296

EDITORIAL BOARD

1 Manuscriots. editorial and advertising corres~ondence should he sent to Edi-

SECTIONS Japan * Los Angeles . Midwest New York San Francisco * Washington

Ediior: HARRY F . OLSOU Managwrg Editor: JACQUELINE H A R V ~ Y

-1~sot i tr tr Editors. 3 1 \ ~ E. G ~ N E S , S L s h h M. LlTT7, and K U B ~ R T S. C~RROLI

I

Jour~ia! of ill,? ilirllo E ~ l g i ~ ~ c e r i i ~ i r Sueiet?. \-oliln18. 11. l o . 3. J u l j . 1 9 6 6 , i'ni~lisllcil ~ju;+rtrrly b\- the Audio Enginct~ving Society and supplied 1 2 , i t l i rl:r.l~tmrr- in goii i i s i a n i i ~ ~ l g . L'ubllcation offit.r. 1UJ- Lihcr,r? Street. I'tica. C. I-. 1:;5il?. Exrcutiva !)Sfice, Itoil111 428. J.i~lcu:n Biiilding. 60 F.:i.' &?rid Stri;ei Sesr Yorl;, \ . \ . l!,C:17. Ei1 tw~11 ,L; ~ecolli i i.l:l~s lniiil fit Tile g n q r oifice a t Lllca. T. Y. Y ? ~ l ~ b ~ r i p : i ~ ~ r ~ l i , ~l(~l~ll lel l lLei.~. $ 1 1 vrl- :-eilCr

(:,~l>> ~ 1 x 1 ~ ~ l < l < < t i LS? ti,? :iu~Iin E I I ~ I I I ~ , ~ T ~ I ~ ~ hoci~t:-. TI)+ .JOI,YII:~I i. i ~ ~ c l e s c ~ ~ l ill r l ~ e -1 p717ie<7 ,Sciet,,,d tf 1 ' e r : l v , U , J ~ O ~ . U 111ilf . L .

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B~i t i sh 1 iatsot~ British Sound Recording 4ssociatian, London W. C. I . England

torial offices. Audio Engineering ~ n c i e t ) journal, 124 East 40th Street New York 10016. Address all other Society brisiness to the Audio Engineering S o c ~ e t ~ . Room 428. Lincold Bo~lding, 60 East 40th St.. New York. N Y, 10017. \lembershia information and hack copieb ma\ be obtained from either ofice.

Journal of the


OFFICERS F O R 1965-66 President Hrjc13 S. KNOR-LES

IRVING L. JOEL Cenfral Vice-President JOSEPH F. WELLS

Executive Vice-President DANIEL R. VON RECKLINGHAUSEN Eastern Vice-President

Western Vice-President DEWITT F. MORRIS

ARTICLES

A Solid State Transient Test Signal Generator-Glen R. Southworth . 298

Secretary JOHN D. COLVIN Treasurer RALPH A. SCHLEGEL

ROARD O F GOVERNORS

COMMITTEE CHAIRMEN Admissions-J. D. COLVIN Awards-F. K. HARVEY Exhibits-J. HARVEY Fall Convention-D. R. VON

RECKLINCHAUSEN Finance-R. A. SCI~LECEL Historical-J. D. COLVIN Laws d Resolutions-H. F. OLSON Membership-J. G. WOODWARD Nominations-D. W. MARTIN Public Relations-J. HARVEY Sections-E. P. VINCENT Spring Convention-D. F. MORRIS Standards-F. A. COMERCI Sustaining Memberships-R. C. MOYER

SECTIONS Japan Los Angeles * Midwest New York * San Francisco a

Washington

Instrumentation Trends for Noise Reduction Work, as Seen by a Me- chanical Engineer-Peter R. Baade . . . 302

Instrumenting the Subjective Measurement of Product Xoise-Elmet. E. Rabek . . . . . . . . . . . . . . 307

Transistor Amplifier Design Considerations When Dealing with Mul- tiple Sources of Supply-Stanley R . Zachary . . . 314

Pitfalls in Hearing Aid Response Curves-Robert J. Briskcy, William II. Gree~zbaum, and John C. Sinclair . . . . . . . . . 31 7

Acoustic Requirements of Stereo Recording Studios-John E. Volkmann 324

Development of Horn-Type Moving Coil Driver Unit-J. K. Hilliard and J . A . Renkus . . . . . . . . . . . . . . . . 328

Additive Synthesis of Harmonic Musical Tones-J. W. Beaz~champ . 332

Multiple Speed Tape Duplicating-J. L. Oonzs . . . . . 343

Dimensional Standards Proposal xo. 925-Endless Loop Cartridges, Types T , IT and 111-BIA Engineering Ofice . . . . 35h

DEPARTMENTS

. . . . . . . . 3 1st Convention Exhibit Sections 394 Preview . . . 361 Membership Information . 386

Letters to the Editor . 368 Shopping the Audio Marltet . 398 Standards . . . 3 76 Available Literature . . . 404 Sound Track . 380 Index to Volume 14 . . . 400

EDITORIAL BOARD

Editor: HARRY F. OLSON Managing Editor: JACQUELINE HARVEY

Associate Editors: JANE E. Ga lc~r s , E L I / A B ~ I H BRAHAU, and PATHICI~ LOUGIT~ lh

1 Manuscriats. editorial and advertising correspondence should be sent to Edi-

Jo~n.nnl c r i the Audio Snginceriilg Society. \-c,lurne I & No. 4 Octobcr. l$I(i(j. Publishpd quarterly 11)- ihe .India Enginnerins Soeictv and supplied t u uli members in good standing. f ublication office, 162 1~ihe4ty Street, Ctica, N. Y. 13502. Executive ofticc, ltoom 428, Lincoln ~ d l d i n g , 60 East, 42rtd Street, NEW York. X. TI. 10017. Entered as second class mail at the post office at Gtica. S. TI. Gabscri~)tion t o nonmernhers, $11 per yeas. Copyright 1966 by the Audio Engineering Society. The Journal is indexed in the Applied Science 1 Techmolo.q.~ Indea. The Jouvnnl of alre Audio Erlgineerlng Society hereby grants perniiss~on to reprint in part , any paprr i n this issae if direct j~rnmiss~on is obtained from its author(s ) and credit is given to the author(s ) and this journal. S h aabhor, or 111s research alliliaye mas reproduce his paper in full crediting rhis journal. This permission is slot assignable. Tlrr "Journal o f t h e Audio Er~,qine~:ivi,q S o c i e t ~ " and its coyer dcsign has been registered as a trrtrlernarlc in the C'nil~rl St i~t ,es Pn,t,enr Office.

British Liaison British Sound Recording Association, London W. C. 1, England

torial offices, Audio Engineering society journal, 124 East 40th Street, New York 10016. Address all other Society business to the Audio Engineering Society, Room 428, Lincoln Building, 60 East 42nd St., New York, N. Y. 10017. Membership information and back copies may be obtained from either ofice.

OFFICERS 1966-67 i'vcride~zt I). It. von Recklinghailsen Extczrlior. Virc-Picsit/i>?zt I.co 1. Beranek Ka.\tcrtt I'icc-l'residr~zt Ernil P. Vincent Ccntral Vir-c-Prrsidr2~z! Jack Hehrend VYr.iti,rir V i r ~ - l ' r f ~ ~ i d e ? z t Juhrr P. Jarvis S P ~ S P ~ I I I . ~

John D. Colvin Ti.r.irs~lri.r IZalph A. Schlcgc)

BOARD OF GOVERNORS lohn S. Saumann Arthur E. Grubcr Floyd K. Harvey 0:lvici 1.. Klepper Hugh S. Knowles Daniel W. Marrin John T. Mullin Rein Narrna Harry I;. Olson William H. Thomas

COMMITTEE CHAIRMEN Admissions-J. T. Mullin .Awards-D. W. Martin Convention---32nd-J. P. Jar-vis C'onvention-i3rd-E. P. Vincent ('onvention Policy Comrnittec-

D. W. Martin Executive Operating Comrnittse----

D. R. von Kecklinghausen Exhibits---J . Harvey Financc--R. A. Schlcgel Histol-ical-J. D. Colvin Laws & Resolutions---L. L. Bcranek Library Committee-l. L. Joel &

J. D. Colvin Membership-A. E. Grubel- Nominations-H. S. Knowles Publications I'olicy Committee--

L. I-. Heranck Seclionh-L). L. Klepper Standards-H. E. Roys Suslaining Memberships-

Mf. H. Thomas

SECTIONS lapan-I os Angeleb-Midwe\[- New Yo1 k San Francisco LVashlngton

JOURNAL OF THE

AUDIO ENGINEERING SOCIETY VOLUME 15 NUMBER 1 JANUARY 1967

ARTICLES

Design Consid~era~tions of a New Continuous Tape Cartridge System- . . . . . . . . . . . . Ralph E. Cozrsino

Automotive Tape Pl;lyers-Alfred E. llusey und Robert A. Wolf . - Higher Speed Duplication of Eight-Track Tapes with Enhanced

Dynamic Range-K~i/h (3. .lohnson trnd Carl S. N~l .ron . . .

Adapting S'tereo Tape l o the A~rtomotive Environment-John P. King - An 8-Track Stereo Citrtridge lor Automcvtive Use"'-'l'heodol-e R. Naiitly The Co'mpact-Cassette System for Audio Tape Recorders-E. F. Ol ten .~

Some Design Con~iderntio~ns of the Endless Loop Magnetic Tape Cartridge and Player-A. E. Roys a n d L. C. I l ~ ~ r l o ~ v . -

Design Considerations for Magnctic 'Tape Used on Continuous I'oop C'artridgcs-R. C. Snzith a17d Peter .I. Vo,qel~ye.srrng . . . .

A Digital Computer for the Electronic Music Studio-M. David tlreedniarz

A Self-checking Audiometer-D. W. Fl~.g,stad . . . . . . A Portable 'Iransistorizcd Mising C:onsole for the Record Industry-

Gerhard L ~ h n e r . . . . . . . . . . . .

l'ransistor Microphone Slnall Signal Paranletcrs--7. F. Lor r ,~~i~e l l . . Two Noise Cancelling Microphones Tor Aircraft Usc-Hurry Triler . An Anechoic C h m b e r with Blanket Wedge Construction-

C;orrlon I:. Pc,/erson, George A. Hrlli4:crrfh and H ~ i g k K. Ilunn . .

rZ liepeatable Tcchniquc for listening Tests-P~rcy Wilson . . .

DEPARTM ENYS 12nd C onvcnt~on . 76 3ound Trnck . ~ . 120 Complctc Convent~on Progranr 84 Ava11,tble IAlter,~ture . 111 Membership Information . 104 Shopp~ng the A u d ~ o Markct 136

. New? ol the Sections . . . 116 Fditorial 128

EDITORIAL BOARD

1)onald M. Black David I . Klepper. N. C . Pickering Frank A. Comerci Donald S . McCoy H. E, Roys John D. Chlvin John G. McKnight Robert Schwart~ John M. Hollywood Jerry B. Minter F,mil P. Vincent Clyde R. Keith Adolph R. Morgan D. K. von Recklinghaosen Earle L. Kent Rober-t E. Owen J. G. Woodward

Editor: H'arry F Olson

Managing 6tliror: Jacqueline Harvey Copy kdlior Elizabeth Hraham

Manuscripts, editorial and advertising correspondence ~hou,ld be scnt lo Editorial Offices. Audio Engineering Society Journal. 124 East 40th Street, New York 10016. Address all other Sociely business to the Audio Enginccring Society. Room 428, Lincoln H~rilding, 60 East 42nd St., New York, N. Y. 10017. Membership information and back copies may be obtained from either ofice.

Journal of the Audio Englneering Soc~ety. Volume 15, No 1, January. 1967. Published quarter ly by the Audio Engineering Society and supplred t o all members i n good standing. Publication offlce. 104 Liberty Street. Uttca, N. Y. 13502. txecut ive o f f~ce. Room 428, L ~ n c o l n Building. 60 East 42nd Street, Ncw York. N. Y. 10017. Entered as second class ma l l at the post office a t Utica. N. Y. Sub scrlptlon t o nonmembers, $11 per year. Copyright 1967 by the Audio Engirreer~ng Soc~ety . The Journal 17 indexed i n the Applled Science &Technology Index. The Journal o f the Audio Enelneering Society hereby grants permission t o repr int i n part, any oaoer i n t h ~ s Issue ~f dlrect nermisslon 1s obtained f rom ~ t s author(s1 and c r e d ~ t 1s aiven t o t he i u i ho r ( s ) and thts journal. ~ n ' a u t h o r , o r his research aff i late may reproduce his papei-~ri f u l l cred- i t tng th is journal. This pcrmlsslon is not assignable. The "Journal o f the Audio Engineering Society" and ~ t s cover design has been registered as a trademark In the U n ~ t e d States Patent Office. ,-=&,

JOURNAL OF THE

OFFICERS 1966-67 Pi r~zdrrit D. R. \on Reckl~nghause~l R z e c z r t z ~ ~ ~ Vi, ('-P1 e ~ z d e n t Leo L Bcr anek En\tr? n Virr-Pu~sldetlf Em11 P . V~ncent Grrzttnl l'zrr Preszdrni Jack Behrend t r rc t~rn llzrr-Pt r~zdenl John P. Jarvis S L ' L ~ rtilry John D. Colvln 7 rr asw cr Ralph 4 Schlegel

BOARD OF GOVERNORS John 5. Baumann Althur F. Gruber Floyd K. Harvey Dabid L Klepper Flugh S. Knowle< Danlel W. Martin John 1. Mull~n Rein Narma Harry F. Olson Wilham H. Thomas

COMMITTEE CHAIRMEN Admissions-J. T. Mullin Awiirds-D. W. Marlin Convention--32nd--J. P. Jarviu Convention-33rd-E. P. Vincent Convention Policy Committcc-

D. W. Martin Executive Operating Committee-

D. R. von Recklinghausen Exhibits-J. kla~vcy Finance-R. A. Schlcgel Historical-J. D. Colvin Laws & Resolutions-I.. I.. Beranek T2ibrary Commitlee-1. L. Jocl &

J ~ D. Colvin Mcmbership-A. E. Gruber Nominations-H. S. Knowlcs Publications I'olicy Cornmiltee- -

L.. L. Reranek Scctions-D. L. Klcpper. Standards- H. E. Roys Sustaining Membcrshipy--

@ , W. H. Thomas

I SECTIONS 1 apan-Los Angcles--hl idwext- Ncw York--San Francisco- Washington

AUDIO ENGINEERING SOCIETY VQLUIVIE 15 NUMBER 2 APRIL 1967

ARTICLES

High Frequency Internlodulation T'esting of Stere'o Phonograph I'ickups- . . . . . . . . J. G. bVoodwnrd ~ 1 1 7 8 K. E. TVerner

On the Measurc~nent of Kumble in Pho~nograph Reproduction- Benjaniin B. Bnrrcr . . . . . . . . . . . .

Audibility o i Tape Dropouts-Ben~umin B. Hucrer, F r m k A . Conlcv+ci, Edward I . Posirr and Allrln .I. Rosen11rc.k . . .

. . . . . . Tape Reproducer Response-John C. McKnight JZeproduccr Test Tapes, Th'eir Evolution and Manufacture-

Robert K. Morrison . . . . . . . . . A 1-o~w-Nois~e, Two-Wir~c, Condenser Microphone Preamplifier--

Mead C. Killiorl . . . . . . . . . . . -nts- A Rccord-Level Tn8dicator for Repetitive Transi,

Oliver H. McDrrnic~l nnd 1crme.r H. Prout . . . . . . - A High-speed Transient Analyzcr--Gordon K. Partridge . . Tilne Delay Units for Sound Reinforcement Syst8ems--Dtr~lid L. Klepper- In~proving the IZeliahility of Sound Systc~ms . . . . . . . The Gcrnianium Planar FET-A New Dcvice for Radio Applications--

Drrvid N. Leonard, Steve T. Ou and Jock. H. Ahrrrzatlly . . - Measurements of the Phase o f the Stereophonic Subcarrier in F M

. . . Stereophonic 1-ransmiss,ion-Lawrenc,r C. Middkcktrnzp 'Thesorctical and Practical Considerations in the Equalizalion of Soulld

. . . . . . . . . Sys'tems--Williritr~ K. Cont1r.r Transistorizc'd dc Condencer Microphone-Jiniclziro Nrrlian~arc~ arzd

. . . . . . . . . . . Rinske UJakabcryrr.si:i Some Examplcs of Sound-System Correction of ~coustically-Difficult

. . . . . . . . . . . Rooms-C. R. Boner

DEPARTMENTS

. . . 32nd Convention 221 Available Literature . . 145 Exhibit\ I'revicw Shopping the Audio Market . 248

. . . . . Membership Intornintion . 334 Obituaries 250 Letters to the Editor . . 244 Sound Track . 251

Ncwc of thc Sections . . . 246

%2

% EDITORIAL BOARD

Donald M. Black : David L. Kleppcr N. C . Pickering Frank A. Conierci Donald S. McCoy H. E. Koys ohn D. Colvin I John G. h4cKnight Robcrt Schwarrz ohn M. Hollywood Jer-ry B. Minter EmiI P. Vincent

Adolph R. Morgan B. R. von Recklinghausen Earle L. Kznt ; Robert E. Owen J. G. Woodward

Etliror: Harry F. Olson

Mrrnclgirz,? F:ditorr Jacq~lelinc Harvey * Copy Editor: Elizabeth Hraharn

%* * B &- Manuscript\, editorial and advcrtislng correspondence should be sent to Ed~torlal ,,g Office\, Audio E,nginee~ing Socicty Journal. 124 Ea5t 40th Street, New York 10016 & 4ddress all other Societ) business to t h e Aud~o Engineering Soc~cty, Koom 428. ~5 Lincoln Hu~ld~ng, 60 Fa\t 42nd S t , New Yolk, N. Y. 10017. Mcmbe~ship informa :B t ~ o n and hack copies may be obtaincd from c~thei ofice "A

mark i n the United States Patent Office.

OFFICERS 1966-67 Presideiz t D. R. von Recklinghausee: Executive Vice-President Leo E. Beranek Easlertz Vice-President Emil P. Vincent Central Vice-President Jack Behrend V7;esteriz Vice-President John P. Jarvis Secretary John D. CoIvin Treasurer Ralph A. Schlegel

BOARD OF GOVERNORS John S. Baumann Arthur E. Gruber Floyd K. Harvey David L. Klepper Hugh S. Knowles Daniel W. Martin John T. hlullin Rein Narma Harry F. Olson William H. 'Thomas

COMMITTEE CHAIRMEN Admissions-J. T. Mullin Awards-D. W. Martin Convention-32nd-3, P. Jarvis Convention-33rd-E. P. Vincent Convention Policy Committee-

D. \*'. Martin Executike Operating Comrnittee-

D. R. von Reckiinghausen Exhibits-J. Harvey Finance-R. A. Schlegel Historical-J. D. Colvin Laws & Resolurions-I.. 1.. Beranek Library Committee-I. L. Joel R:

J. D. Colvin Membership-A. E. Gruber Nominations-H. S. Knowles Publications Policy Committee-.

L. L. Beranek Sections-D. L. Klepper Standards-H. E. Rops Susraining Memberships-

W. H. Thornas

JOURNAL OF THE

AUDIO ENGINEERING SOCIETY VOLUME 15 NUMBER 3 JULY 196f

ARTICLES

Absolute Flux and Frequency Response Characteristics in Magnetic Recording: Measurements. Definitions. and Standardization- John G. McKniglzt . . . . . . . . 254

Design Evolution of a FET Condenser Microphone System- Jarzes J . Noble , . . . . , . . 273

, Score-Drawing Program-Jih-Jie Chang and M . V. Marhewc . . . 279

A Comprehensive Sound Measurement Console-Ervin E. G r o ~ s . . 282

An Ultra-Low Distortion Direct-Current Amplifier-Bart N. Locantki 290

A Practical Ear Enclosurc with Selectively Coupled Volume- Alfred L. DiMattia . . . . . . . . . . 295

Linear Microelectronics in the Implementation of Audio Control Functions-Basil T. Barber . . . . 259

A VOX System for Operation at High anci Variable Ambient Levels- E. Torick and R. Allen . . . . 303

Audio in a Video World-Oliver Berimer ~ ~ ~ 308

A list of Published Standards Related to Magnetic Sound Recording- Johrz G. McKnight . " . ~~. . , 314

DEPARTMENTS

32nd Convention . . 328 Available Literature . 355 Complete Convention Program 334 Shopping the Audio Market . 358 Letters to the Editor . 348 Melnbership Infori~lation 361 News of the Sections . 352 Sound Track . . . 364

EDITORIAL BOARD

Donald M. Black David L. Klepper N. C. Pickering Frank A. Comerci Donald S. McCoy H. E. Roys John D. Colvin John G. McKnight Robert Schwartz John M. Hollywood Jerry B. Minter Emil P. Vincent Clyde R. Keith Adolph R. Morgan D. R, von Reckiinghausen Earle k. Kent Robert E. Owen J. G. Woodward

Editor: Harrq F. Olson

Managing Editor: Jacqueline Harvey Copy Editor: Elizabeth Braham

Manuscripts, editorial and advertising correspondence shodd be sent to Editorial Offices, Audio Engineering Society Journal, 124 East 40th Street, New York 10016. Address all other Societ) business to the Audio Engineering Society, Room 428, Lincoln Building, 60 East 42nd St.. New York. N. Y . 10017. Membership information and back copies may be obtained from either ofice.

SE@TIOI\%S Journal of t he Audlo E rg~nee r l ng Soc~ety Volume 15, No. 3 July, 1967 Pub l~shed quarter ly by Japan-LOS Angela--Midwest- qq

the Audlo E n g ~ n e e r ~ n g Soc~ety and supp l~ed to all members In good s tand~ng. Pub l ica t~on off lce 104 Llberty Street U t ~ c a N Y 13502 Execut~ve off lce Room 428 Llncoln Bul ldlng 60 East 42nd

New York-San Francisco- &$ Street New York, N Y 10017 Entered as second class mal l a t t h i post o f f ~ c e at ~ t k a N Y Sub Washington $@ scriptton t o nonmembers $11 per year Copyr~ght 1967 by t he Audlo Eng lneer~ng Soc~ety The

@ Journal 1s Indexed in the Applied Sclence &Technology Index. *, The Journal of t he A u d ~ o Eng~neering Soc~e ty hereby grants perrnlsslon t o repr int ~n part, any WDM1NISTRATION paper In th is Issue ~f dtrect permission IS obtalned fram i ts author(s) and c r e d ~ t IS grven t o the

author(s1 and th is journal An author or n is research a f f ~ l ~ a i e may reproauce nls paper i n Full cred Etecutzze Asszsta~zf t t ~ n g th ls journal Thls perrnlsslon IS not assignable

The "Journal of the Audlc Eng~neering Society" and ~ k s cover d e s ~ g n has been registered as a Dorothb H. Spionck t rademark i n t he Unlted States Patent O f f ~ c e

OFFICERS 1966-67 President D. R, von Recklinghausen Executive Vice-President Leo L. Beranek Eastern Vice-president Emil P. Vincent Central Vice-PresidenE Jack Rehrend Western Vice-PresidcnC John P. Jarvis Secretary John D. Colvin Treasurer Ralph A. Schlegel

BOARD OF GOVERNORS John S. Baumann Arthur E. Gruber Floyd K. Harvey David L. Klepper Hugh S. Knowles Daniel W. Martin John T. Mullin Rein Narma Harry F. Olson William H. Thomas

COMM!fTEE CHAIRMEN Admissions-I. T. Mullin Awards-D. U'. Martin Convention-32nd-J. P. Jarvis Convention-33rd-E. P. Vincent f onvenrion Policy Committee-

D. W. Marrin Executive Operating Committee-

D. R. von Recklinghausen Exhibits-J. Harvey Finance-R. A. Schlegel Historical-J. D. Colvin Laws & Resolurions-L. L. Beranek Library Committee-I. L. Joel R:

5. D. Colvin .Membership-A. E. Gruber Nominations-H. S. Knowles Publications Policy Committee-

L. L. Beranek Sections-D. L. Klepper Standards-H. E. Roys Sustaining Memberships-

W. H. Thomas

SECTIONS Japan-Los Angeles-Midwest- New York-San Francisco- Washington

ADMINISTRATION Erecutiz-P Assistant Dorothy H . Spronch

JOURNAL OF THE

AUDIO ENGINEERING SOCIETY VOLUME 15 NUMBER 4 OCTOBER 1967

ARTICLES

'Tone Generation with Multiple Synchronous and Non-Synchronous RC . . . . . . . . . Oscillators--Robert E. Owen 366

Acoustical Measurements by Time Delay Spectrometry- . . . . . . . . . . . . Richard C. Heyser 370

AnAudioNoiseReductionSystem-RayM.Do1b.y . 383

Factors Affecting the Needle/Groove Relationship in Phonograph Playback Systen~s-C. R. Bartiaans . . , 3 8 9

Survey of Methods for Measuring Speech Quality-Michael H. L. Hecker . . . . . . . . . . . and Newmun Gzittnzan 400

A Comparison of Two Types of Digitized Autocorrelation Vocoders- Calvin F. Howard, Harold J. Mnnley and .Tczmes C. Stoddard . . 404

Information Content of a Sound Spectrogranl-Tiong Suy Y u . . . 407

A Limited-Vocabulary Adaptive Speech-Recognition System- . . . . . . . . . . . . . Paul W. Ross 414

Directional Microphones--Hurry F. Olson . 420

A New Concert Violin-Carleer? Mnley H~ltchins and John C. Schelleng 432

Miniature Audio Amplifiers-Willinn7 H. Greenbaum . . . 438

Sensitivity of Phonograph Turntables to Normal Loads-T. S. Cole, Sr. . 446

DEPARTMENTS

Letters to the Editor . . 452 Meinbership Information . . 480 Obituaries . . . 464 Sound Track . , . 483 Convention Exhibits Preview . 466 Shopprng the Audio Market . 485 News of the Sections . . 472 Editorla1 . . . 48s Available Literature . . 477 Indc l to Volume 15 . . 489

EDITORIAL BOARD

Donald M. Black David L. Klepper N. C. Pickering Frank A. Comerci Donald S. McCoy H. E. Roys Tohn D. Coivin John 6. McKnight Robert Schwartz John M. Hollywood Jerry B. Minter Emil P. Vincent Clyde R. Keith Adolph R. Morgan D. R, von Recklinghausen Earle L. Kent Robert E. Owen J. G. U700dward

Editor: Harry F. Olson

nrlar~crging Editor: Jacqueline Harvey Copy Editor: Elizabeth Braharr

hfanuscripts, editorial and advertising correspondence should be sent to Editorial Offices, Audio Engineering Society Journal, 124 East 40th Street, New York 10016. Address a11 other Society business to the Audio Engineering Society, Room 428, Lincoln Building, 60 East 42nd St., New York, N. Y. 10017. Membership information and back copies may be obtained from either office.

Journal of t he Audio Engineering Society. Voiume 15, No. 4, October. 1967. Published quarter ly by the Audio Engineering Society and supplied to al i members i n good standing. Publication office, 104 Liberty Street, Utica, N. Y. 13502. Executive office, Room 428, Lincoln Building, 60 East 42nd Street, New York N. Y. 10017. Entered as second class mai l a t the post office at Ut lca, N. Y. Sub- scription t o nonhembers , $11 per year. Copyright 1967 by t he Audio Engineer~ng Society. The

, Journal i s lndexed i n t he Applied Sclence &Technology Index. i The Journal of t he Audio Engineer~ng Society hereby grants permission t o reprint i n part , any

paper In th is issue i f direct permission is obtained f rom i ts author(s) and credit is given t o the ; author(s) and th is iournal. An author, o r his research aff i l iate m a y reproduce hls paper In f u l l cred- i i t ing th is journal. i h i s permission is not assignable.

The "Journal of t he Audio Engineering Society" and i ts cover design has been registered as a I t rademark in the United States Patent Office. c&?*,>, .-

OFFICERS 1967-68 P~esideur Leo E. Beranek Exemtiwe Vice-Pvesidenc Benjamin B. Bauer Easterr? Vice-Presidest J. Guy Woodward C e ~ c r a l Vice-Presidelzt Ear!e E. Kent Ttlesierr, Vice-Prajidelzt Donald B~ Davis Secretary J O ~ I I D. Collin Treeswer Ralph 4. Siblegel

BOARD OF GOVERNORS iahn S Baumann John H Beaumonr Arthur E Grilber john P. JarL~s David E. Klepper Hugh S Knowles Dame1 W. Martln Harrj F. Olson D a n i e l K von Reckl1nghau5i.r Saul 3 M hite

COMMITTEE CHAIRMEN Adm~ssion\-S J Whrie ~ludrd5-H S KnowIes Con\ enrlon-34th-D R D ~ T 15

Con\ entian-25th-1 G W o o 6 ~ dl d G~n\~eni lon Policb Commlitee-

D W hlarrlrj Everutave Operating Comrn~ttee--

I L Bclanek Exhrblts-J H a r ~ el rmnanasc-R A Schlegel Hrstoncal-T D Col\ ~ r ;

Ldks & Resolutions-B l3 Balie. Library Cornm~tlea--I L. Joe! a

J, D eolx In \femisersh~p-J P larvls bnrn~nat~on\-

D R Lon Rechllnghau>er Publ~satlons Pollc\ Cornm~ttee-

El B Hauer Secnons-J H Beaumonr Stasdardc-H E Roys S~stalnlng Membersh~ps--

1% H Thorrlas

SECTIONS Japan-Los Angeles-Mid% esr-

p 'New York-San Francisca- Washingdon

ADMlN ISTRATION E:.ecvtize -4:rirtanr Dorothy H. Spronck

JOURNAL OF THE

AUDIO ENGlNEERlNl SOCIETY VOLUME 16 NUMBER 1 JANUARY 1968

ARTICLES

Sound at Expo '6'7-N. E. Ru~lback . . ~ ~ . . . . 7

Audio Facilities for the Labyrinth Pavil~on. Expo '67-P A4undie . ~ 7

Audio Visual Engineering-A New Discipline? -William Szaho . . 14

The RIAA Engineering Committee-H. E. Royr . . . . 18

A Brief Review of EIA Standards in the Audio Field-/. A. C~lffiollx Zi

The Role of the Society o t Motion Picture and Television Engineer5 In Audio Standardization-H. W Knap, .I,-. . . . . . 26

Protection of Amplifiers-Dnr~iei R, >on Reckli~z,olza~~sc.n . . a 32

Power Output and Power Dissipation in Class B Transictor Amplifiers- Ralph S. Hrzrrz ai7d Frederick S. K a ~ r ~ p . . . . . . 38

Jntcgratcd C~rcui ts in Organs-Harold 0. Sr ~ Z I L trrfi S S

Computer Control of Sound Apparatus for Electronic Music- Janles Gnbura N I ? ~ G~(\t(lv Cinn~clga . ~ 45

,4ud1o F'tcilities for the Audio Engineering Society Conventions- - ?. I l - ~ i t l g L. Joel. Keith A hforrir, rind H11g1z N. Rr(s~t ' l l . . . 3-

Extend~ng Mhgnetic Head Life by Lspping Techniques-Willini71 D. Znhei- 61

Resistance-Capacitance Active Filters for Audio-Frequency Applications- Dclvicl Friend . . . . . . , . . . . 94

DEPARTMENTS

33rd Convention . . 68 Sound Track . l l h

Complete Convent~on Progr'im 76 Ava~lable Literature . I f b Letters to the Edltor . 113 M e n ~ b e r s h ~ p Information 113

Shopping the A u ~ t ~ o Market . 114 News of the Sections ~ 126

EDITORIAL BOARD

Donald \I. Black Davld L Kleppel N C Plchering Frank A Con~ercl Donald S. h l c C o ~ H E Roys John D CoIvin John G McKnlght Robert Schuartz Tnhn tl Hollj wood Jerry B Minter Em11 P. Vincent Clyde R Ke~:h AdoIpn R, Morgan D. R. rion Recklmgha~lsen Earle L Kent Robert F Owen J G Woodward

Edltor: Harry F. Olson

Mn~?nping Edrtor: Tacqueline Harx el Copy Editor: Elizabeth Braham

Manuscripts, editorial and advertising correspondence should be sent to Editorial Offices, Audio Engineering Society Journal, 124 East 40th Street, New York 10916. Address all other Society business to the Audio Engineering Society, Room 4% Lincoln Building, 60 East 42nd St.; New York, N. Y . 10017, Membership inforrna- tion and back copies map be obtained from either office.

Journal of the Audio Engineering Society. Volume 16 No. 1, January 1968. Published quarterly by the Audio Engineering Society and suppiied t o all &embers i n good s tand~ng . Publication office. 104 Llberty Street, Utica. IU. Y. 13502. Executive o f f~ce , Room 428, Lincoln Bullding, 60 East 42nd Street, New York, N. Y. 10017. Entered as second class mai l a t t he post of f ice at Utica, N. Y. Sub- scr lpt lon to nonmembers, $11 per year. Copyright 1968 by the Audio Engineerrng Society. The Journal is indexed In t he Applied Science & Technology Index. The Journal of t he Audio Engineering Society hereby grants permission t o repr int In part . any paper in th is issue, i f direct perrntsston is obtained f r om i ts author(s) and credit IS given t o the author(s) and th is journal. An author, or his research aff i l iate may reproduce his paper i n f u l l credit ing this journal. This permission is not assignable. The "Journal of the Audio Engineering Society" and i ts cover design has been registered as a trademark i n t he United States Patent Office. ,s:..

-p:.*u: ,>=-

OFFICERS 1967-68 President Leo L. Beranek Exacutive Vice-Presider~t Benjamin B. Bauer Eastern Vice-President J. Guy Woodward Central Vice-President Earle E Kent Western Vice-Presideat. Donald B. Davis Secretary John D. Colvin Treasurer Ralph A. Schlegel

BOARD OF GOVERNORS John S. Baumann John H. Beaumont Arthur E. Gruber John P. Jarvis David L. Klepper Hugh S. Knowles Daniel W. Martin Harry F. Olson Daniel R. von Recklinghausen Saul J. White

COMMITTEE CHAIRMEN Admissions-S. J. White Award-H. S. Know!es Convention-34th-D. B. Davis Convention-35th-J. G. Woodward Convention Policy Committee-

D. W. Martin Euecutive Committee-

L. L. Beranek Exhibits-J. Harvey Finance-R. A. ~chlegei Historical-J. D. Colvin Laws & Resolutions-R. R. Bauer Library Committee-I. L. Joel and

6. D. Colvin Membership-J. P. Jarvis Nominations-

D. R. von Kecklinghausen Publications Policy Committee--

B. B. %aver Szctions-J. M. Beaumont Standards-H. E. Roys Sustaining Memberships-

W. H. Thomas Tellers-W. H. Freitag

SECTIONS Japan-Los Angeles-kIidwest- New York-San Francisco- Washington

ADMlNiSTRATlON Executive Assistant Dorothy H. Spronck

JOURNAL OF THE

AUDIO ENGINEERING SOCIETY VOLUME 16 NUMBER 2 APRIL 1968 I

ARTICLES 1 360" Conical Wavefront Loudspeaker for New York Urorld's Fair-

John E. Volkmann, Adolph R. Morgan and Harry F. O l ~ o n . . One Kilowatt Cylindrical Wavefront Loudspeaker with Folded, Modular

. . . Horn for New York World's Fair-John E. Volkrnann Sound Systems at the Two New York World's Fairs-

Arrizur W . Schneider . . . . . . . . . . . Audio-Synchrontzed Programmer for the Fountain of the Planets,

1964-1965 New York World's Fair-Arthur W. Schneider . . The Film Projector-Magnetic Reproducer Double Sound System at

CBS Television Broadcast Center, New York-Artkuw C. Helmer . Phonovid-A System For Recording Television Pictures on

. . . . . . . Phonograph Records-Kenneth E. Farr The NAB Recording and Reproducing Standards-Warren L. Braun . International Standards for Audio and Electroacoustics-

. . . . . . . . . . . . William W. Lang The Influence of First and Second Formants on the Intelligibility of

Clipped Speech-Ian B. Thoinas . . . . . . . . . Tracking Ability Specifications for Phonograph Cartridges-J. H. Kogen

. . . . . . . . . The Charge Amplifier-David Bell A Miniature Condenser Microphone for Transient Measurementq-

Bob R. Beavers . . . . . . . . . . . . . Filtering R F Interference in Audio Equipment-R. S. MacColli~rer .

DEPARTMENTS

. . . . . Letters to the Editor 216 News of the Sections 240 Exhibits Preview 34th Shopping the Audio Market . 241.

. . . . . . Convention 222 Avai lab leLi te ra ture . 258 . . . . Membership Information . . 232 Sound Track 254

Editorial . . . = 256

EDlTORlAL BOARD

Donald M. Black Donald S. McCoy H. E. Roys John D. Colvin John G. McKnight Robert Schwartz John M. Hollywood Jerry B. Minter Emil P. Vincent Clyde K. Kelth Adolph R. Morgan john E. Voikrna~~n EarIe L. Kent Robert E. Owen D. R. vsn Recklinghausen David L. Klepper N. C. Pickering J. G. Woodward

Editor: Harry F. Olson

Managing Editor: Jacqueline Harvey * Copy Editor: Elizabeth Braham

Manuscripts, editorial and advertising correspondence should be sent to Editorid Offices, Audio Engineering Society Journal, 124 East 40th Street, New York 10016. Address all other Society business lo the Audio Engineering Society, Room 428. Lincoln Building, 60 East 42nd St., New York, N. Y. 10017. Membership information and back copies may be obtained from either office.

Journal of the Audio Engineering Society. Volume 16 No. 2, April 1968. Published quarterly by the Audio Engineering Society and supplied to all mekbers in good standing. Publication office, 104 Liberty Street Utica N. Y. 13502. Executive office Room 428, Lincoln Building 60 East 42nd Street New York N. Y. 1'0017. Entered as second clas; mail at the post office at ~t ' ica. N. Y. Sub- scripti'on t o nonmembers, $15 per year. Copyright 1968 by the Audio Engineering Society. The Journal IS indexed in the Applied Science &Technology Index. The Journal of the Audio Engineering Society hereby grants permission to reprint i n Part, any paper in this issue if direct permission is obtained from its author($ and credit is glven to the author(s) and this journal. An author, or his research affiliate may reproduce his paper In full crediting this journal. This permission is not assignable. The "Journal of the.Audio Engineering Society" and its cover design has been registered as a trademark in the Un~ted States Patent Office,

OFFICERS 1967-68 Leo L. Beranek President B. B. Bauer Executive Vice-President J. G. Woodward Eastern Vice-President Earle E. Kent Central Vice-President Donald B. Davis Western Vice-President John D. Colvin Secretary Ralph A. Schlegel Treasurer

BOARD OF GOVERNORS John S. Baulna~in John H. Beaumont Arthur E. Gruber John P. Jarvis David L. Klepper Hugh S. Knowles Daniel W. Martin Harry F. Olson Daniel R. von Recklinghausen DeWitt F. Morris

COMMITTEE CHAIRMEN DeWitt F. Morris Admissions H. S. Knowles Awards D. B. Davis 34th Convention 3. G. Woodward 35th Convention D. W. Martin Convention Policy L. L. Beranek Executive Committee J. Harvey Exhibits R. A. Schlegel Flnance J. D. Colvin Historical B. B. Bauer Laws & Resolutions I. L. Joel and J. D. Colvin Librarq J. P. Jarvis Membership D. R. von Recklinghausen Nominations B. B. Bauer Publications Policy 3. H. Beaumont Sections H. E. Roys Standards ?V. H. Thomas Sustaining Memberships W. H. Freitag Tellers

SECTIONS Japan Los Angeles Midwest a

New York San Francisco W'ashington

ADMlNlSTRATlON Dorothy M. Spronck Executive Assistant

SOCIETY COMMUNICATIONS Manuscripts, editorial and advertising correspondence should be sent to Editorial Offices, Audio Engineeri~g Society Journal, 124 East 40th Street. New York 10016. Address all other Society business to the Audio Engineering Society, Room 428. Lincoln Building. 50 East 42nd St., New York, N.Y. 10017, Membership information and back copies may be obtained from either office.

JOURNAL OF THE

AUDIO ENGINEERING SOCIETY VOLUME 16 NUMBER 3 JULY 1968

ARTICLES The Scanning Electron Microscope-A New Tool in Disc-Recording Research

J . G. Woodward, M. D. Coutts and E. R. Levin 258 Speed, Pitch and Timing Errors in Tape Recording and Reproducing

John G. McKnight 266 Longitudinal Noise in Audio Circuits . . H. W. Augustadt and W. F. Kannenberg 275 FCC Regulations Governing the Audio Fidelity Characteristics of F M Broadcast

Equipment . . . . . . . . . . . . . . . . . . . . John T. Robinson and L. Glen Whipple 285

The Standards Activities of the Institute of High Fidelity Daniel R. von Recklinghausen 289

. . . . . . . . . . . . . . . . . . . Synchronous Sound for Motion Pictures Loren L. Ryder 291

. . . . . . . Conferencing with Pitch-Excited Channel Vocoders Stanley W. Helms 296 A Completely Solid-State Audio-Follow Video Switching System . . M. H. Stoll 301

. . . . . . . . . . The Acoustic Treatment of Three Small Studios F. Alton Everest 307

. . . . . Automatic Audio Level Control Dale C. Connor and Richard S. Putnam 31 4

Design Factors and Considerations in Full Complementary Symmetry Audio Power Amplifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . George C. Haas 321

. . . . . . . . . . . . . . . . . . . . . An Improved Audiometric Earphone Richard Howard 328

LETTERS TO THE EDITOR Comments on "Sensitivity of Phonograph Turntables to Normal Loads"

. . . . . . . . . . . . . . . . . . (T. S. Cole, Sr., JAES 15: 4 (1967)) Jerome B. Halter 354

Reply to "Comments on 'Sensitivity of Phonograph Turntable to Normal Loads' " (Jerome B. Halter, JAES 16, 3 (1968)) . . . . . . . . . . . . . . . . . . T. S. Cole, Sr. 356

Comments on "Hand Relapping of Heads" (William D. Tnber, JAES 16, 1 (1968)) . . . . . . . . . . . Carlos E. R. A. Moura 356

Comments on " . . . Phase Compensation in Tape Copying . . . " (James W. Beauchamp, JAES 16, 1 (1968)) . . . . . . . . . . . . . . . . . . . Joel Tall 362

Comments on "Factors Affecting the Stylus/Groove Relationsthip in Phonograph Playback Systems" (C. R. Bastiaans: JAES 15, 4 (1967)) . . . . D. A. Barlow 364

DEPARTMENTS . . . . . . . . . . . . . . . . . . 34th Convention . . . . . . . . . . . . . . . 334 Sound Track 378

Complete Convention Program . . . 340 Shopping the Audio Market . . . . . 380

Membership Information . . . . . . . 366 Available Literature . . . . . . . . . . . . 383 News of the Sections . . . . . . . . . . . 376 Obituaries . . . . . . . . . . . . . . . . . . . . 384

EDITORIAL BOARD DonaId M. Black Donald S. McCoy G. M. Sessler John D. Colvin John G. McKnight Robert Schwartz John M. Hollywood Adolph R. Morgan Emil L. Torick Clyde R. Keith Robert E. Owen John E. Volkmann Earle L. Kent N. C. Pickering D. R. von Recklinghausen David L. Kiepper H. E. Koys J. G. Woodward

Harry F. Olson Editor Jacqueline Harvey hlanaging Editor Evelyn A. Morris Production Editor Elizabeth Braham Copy Editor

Journal of the Audio Engineering Societv. Volume 16. No. 3. Julv 1968. Published auarteriv bv . - -

the Audio Engineering Society and suppfied to ali members in gobd standing, Publication of=flc&. 104 Liberty Street, Utica, N. Y. 13502. Execut~ve of fce, Room 428, Lincoln Buhld\ng, 60 East 42nd Street, New York, N. Y. 10017. Entered as second class mail at the post office at Utica, N. Y. Sub- scrlDtlon t o nonmembers, $15 per year. Copyright 1968 by the Audio Engineering Society: The Journal IS indexed in the Applied Science &Technology Index. The Journal of the Audio Engineering Society hereby-grants permission to reprint i n part, any oaoer in this issue i f direct oermission is obtained from its author(s) and credit is aiven to the author(s) and this journal. An author, or his research affil iate may reproduce his paper i n fulf crediting this journal. This permission is not assignable. The "Journal of the Audio Engineering Society" and its cover design has been registered as a trademark in the United States Patent Off~ce.

-:

OFFlCERS 7967-68 L,eo T . Bcranek Prevdent 85. 1%. Baucr Fxesufive Vlcc PI zziderii J, 6, W'uod~ard Fastern Vice-Pres~de~r: hark L. Kent Cenll dl Vlc~z-Pre\tdeni Darnald U. Uavic Wcblcrn Viic-Pre\rdzr~t Kohu D. rullviil Scclctarj Rdpb %. Sclrlegel I ~ra\rl icr

BOARD OF GOVERNORS Jnho S. Ltatrrn.mn Arthur F. Grrabcr John P. Jarvi5 4)s t id k. Bilepper Hugh S. linowlrq Da~ ie ! W. Martin H x r g P. Ok~tin Douald # . Powcr5 D:mieI R. r 011 Kecklinghatrse~~ Demitd F hforric

b'

a;30MMITPEE CHAIRMEN IjeWitl P;, itlomi5 .4dlni\\lons H. S. Gnowles 4m;11ds D. B. Davis i ~ i t h Convent1011 .I. f;. W rrc~dsaed 35th Col~venr~oi l A, K. S n k P 36111 Convent~on George 13 i\. Bartlett 37th Conven~ion 13. W. %tartin C u n ~ e n h o n Policy B . 1,. Berianvek L;*ecui~ve Committee 3- Hanc? F x i ~ r h ~ t \ K. A* Schlegcl J in,rnic J. D. C'crlsin Hlcioi ~ c a l B. B. Xeraer ii-d\h\ A Ke~oli!~ic)17\ I. L. doeP .I. TI. Colvin Lib1 8. P. Xavvii Mc~l~bclbhrp I). K. t o n Rccklangtlansen Norrlin,~tloil\ H. B1. Bar~rr I'iuhlic:t~ronc I'oi~cy Donald \\, P"awcr% Se~ticini H. 8.. Roy, \:,inJarci\ SY. H. Thatma\ Su. t ,~ :n ln~ MernberihEp~ m. H. Bir~isag d i l l r r \

SOCIETY CONDMLlhlBCATIBNS .hI:i!~rrrc:.iptx, zditcwi:ll and aciverlriii-IF coi.l-esp~ridcncc ~l iuu!*i bc senr to Edltori:~! Offices. A%:!dio Fi-iginccring , ~: c ~ l ) Jt)~?i.nai. 124 East 4O1h Str-crt. blew. Y o i - k ;OOJh. Addr.ess ail other. Society i>~r.%ii\cs\ LO rlir Audici Engincc~ illg Sucielq;, Kuoin 428. Litic.oln ii~riltiing. '10 E a h t 42nd St.. Ncv York. N ,Y . 10017. Mcmhcl-ship inicrrrnation and hack copiei. Falay he r~l>razned f:-om cithcr office.

JOURNAL OF THE


ARTICLES A Nen nfelhod of Mrasoring and An;rlyring Intermodo1;ltion . C I 1 eHer XIcthodolog~ Lor Acuust;caf Dat;r Gathering

Benjam~n H Hatie15 and Idward! I Foslci An L lectronic Durnnlj kor Acor15tical Tcrtlnp

F L l orlcL, A TlrMatt~d A. 3 Ko\cnhcch, l A Ahbagndr L) :uicl B. K Ha~1t.1 A Procedure for the Segmentation of Connected Speech

D. li. Rcddi and P 1 Vrien\ hnhancemenl utl Speecl~ Intelliqihility at High Yoise Levels by Filtering aud

C'lipping . Ian B Thom,~\ and J<ilszcll I Nleder lohn I% h e n Method for E*aloatinq the Eflcctivcne~s of Sound Amplification Systems

in Reverberant Spaces J J ,icek F1gwe1 4 Method for Analyiinp, Mu\ical 1 one5 . M Bavrd Freedman An Estimation o t ,lnnoyance <':ansed by Dropouts in Nlajinetically Kecorcfcd

nus ic . . . . . . . . B L Caldo7o and G W o m b ~ ~ r p ,\ Tape C'a\sette Stand:trd . . tduidrd R H'inwn The Stati\Lic\ .of De1:ryed RcHections . M i ~ h ~ f e l Rettrnger An Electronicailly Tunable Bandpas5 Filter Will~atn R~bbcn\ A Mobile I<lectroacon~tic Laboratory i\!ldn H Smrtb An Iolproved Automatic Level-Control ahvice

W~ll rar r~ Ross Ail\en and i'h,tr les 3 Swiihii Flectret Coaden5er Microphones of High Quality and Reliability

IJrc\:on 1' Mrrrphy anti t ~ < e r n a n M Frd~rn h SclCContained Condenser Microphone ~ i f h iniproved 'l'rau4ent Piesgrrn\e

Alan D,iuper and C')-raile> l Sm~shel Splicing 1 apes and Their Proper Application Delos A t r!cr\

LETTERS TO THE EDliTOR

Com~ncnts on "T)cformation Di5tnrtion in Disc Record$" (Take0 Shrga. JAkS 14 7 (1066)) . Duane H Coopt1 4'9

Coanments on L'Yhonovid-4 Systerl~ for Reco~ding Islevisinn I'irtores on Phonograph Iiecnrds" (Kenneth F F ,u i I A b \ 16. 2 (1968)) Albci t Abramwn

lieply to "C'orrirrbeul5 on 'Yhonovid-A 5) stem tor Recording l elevision on Phonogr;iplr Records' " (A lhe~ t Ahrdm\on i A F S 16 4 (1968)) kenneth F r l i r 1%

Conanlent4 tin "Piltering RF' Inlerfere~lce in Audio b,qoipment" (a 3, &lnr(".)!FLrr; I %I % t6 2 ( 1968)) I- upene i Co: 1 ~ 1 1 i-'

DEPARTMENTS

Review ol' Acoustical Patent.: . . . 480 h'lcmhcl.\hip I ~ i l o r - n ~ a ~ i o r ~ . . . 5 20 C'onvcntion Exhibi~s Previe* . . . 488 E(iitor-iaj . . . . . . . . . . . , . . . . . ,522 Available Li1eratui.i; . . . . . . . . . . 5 12 I i ~ u c s to Vol~irnc ih . . . 5 25 News c r f the Sectinn.; , . , . . . . . . 518

EDITORIAL BOARD Ib. M. Black E9 1,. Kent A. It. Morg;lo G. bl. Secsler .X. 12. Calvin D. L. Klepper .I, 'l. hlt~3lim E. L. l a ~ r i c b 8. J. Foster 9. W. Kogen li. F;. Owen J. 15. Vnlltmanrl .I. M. Hcblly~vood B. S. Vlc<'og 1P.l. C', Pickcrixre E). K. I on t<eclilimghati~ean C. R. Keith J. C:. McMnixh:hb If. E. Kovs d . 4;. W"O'oc%v.arel

H-Iarrj F. Olson Ed~roi Jacqueline FI;cr%e) hlan rgiiig I cYi~t$r Etelyrr 4. %Ior r i~ I'rilJ~lcrion Fdirur Eiijaheth BI aliaan Cup1 bdilor

Journa l of the ,Aud~o Engineering Society. V o l u r r ? ~ 16, No 4, October 1968. Piiblished Quarterly 0)' the Audio Englaeering Society and supplied to all members in gaod standing. Publication office 104 Liberty Str-esf. Utica, N. Y. 12502. Executive utfice, Room 428, L~ncoin Building, 60 tas t 42nd Street, New York. N. Y. 10G17. Entered as secorid ciass mall at the post office a t Utica, N . Y. Sub- scrlption to rronrnernbers, $15 per year. Copyright 1968 by t h e Audro Englneering Socrety. Tho Journal IS indexed in the Applied Sc~enk-e & Technology Index. The Journal of the Audio Engineering Society hereby grants perrnission to repr.int irt pan ailg paper ira thrs Issueif direct perrnissiorr is obtained f rom iis author(sj and credlt 1s give!? tb t h e author(s) and ili~s journal. An author, or his research affiliate m a y reproduce his paper in futl crediting this jnlirnal. This per~nission is not assignable The "Journal of t he Audio Engineering Society" and i t s cover design h a s beera registi? Trademark in the United States Patent Office.

OFFICERS 1968-69 Benjamin R. Bauer President Frederick V. Hunt Executive Vice-President George W. Bartlett Eastern Vice-President Harold 0. Kaitchuck Central Vice-President A. R. Soffel Western Vice-President John D. Colvin Secretary John J. Bubbers Treasurer

BOARD OF GOVERNORS Leo L. Beranek Donald B. Davis John P. Jarvis Keith 0. Johnson Hugh S. Knowles DeWitt F. Morris Harry F. Olson Robert E. Owen Donald W. Powers

- Daniel It. von Recklinghausen

COMMITTEE CHAIRMEN D. F. Morris Admissions D. R. von Recklinghausen Awards A. R. Soffel 36th Convention G. W. Bartlett 37th Convention .T. G. Woodward Convention Policy B. B. Bauer Executive Committee J. Harvey Exhibits J. J. Buhhers Finance J. D. Colvin Historical F. V. Hunt Laws & Resolutions J. D. Colvin Library J. P. Jarvis Membership L. I,. Beranek Nominations F. V. Hunt Publications Policy D. W. Powers Sections H. E. Roys Standards D. B. Davis Sustaining Memberships W. H. Freitag Tellers

SECTIONS Japan * Los Angeles Midwest *

New York San Francisco - Washington

ADMINISTRATION Dorothy H. Spronck Executive Assistant

SOCIETY COMMUNICATIONS Manuscripts, editorial and advertising correspondence should be sent to Editorial Offices, Audio Engineering Society Journal, 124 East 40th Street, New York 10016. Address all other Society business to the Audio Engineering Society, Room 428, Lincoln Building, 60 East 42nd St., New York, N.Y. 10017, Membershi~p information and back copies may be obtained from either office.

JOURNAL OF THE

AUDIO ENGINEERING SOCIETY VOLUME 17 NUMBER 1 JANUARY 1969

ARTICLES

On the Interaction between Tracing Correction and a Bandwidth Limitation Duane H. Cooper 2

Operational Amplifier Applications for Audio Systems . . . . . . B. J. Losmandy 14

Direct Radiator Loudspeaker Enclosures . . . . . . . . . . . . . . . . . . . Harry F. Olson 22

Loudspeaker Phase Characteristics and Time Delay Distortion: Part 1 Richard C. Heyser 30

Effects of Intentional Interference with Speech Intelligibility . William B. Snow 42

Feasibility of Automated Analysis of Phonocardiogram J. E. Jacobs, Kazuo Horikoshi and M. A. Petrovick 49

Special Reproduce System for Independence Hall, Knott's Berry Farm Akio J . Hosoda 55

A Modular Audio Facilities Mixing System . . . . . . . . . . . . . . . . . John P. Jarvis 62

DEPARTMENTS

35th Convention . . . . . . . . . . . . . . . 70 Membership Information ....... 106 .................... Conlplete Convention Program . . 79 Obituaries 122

Review of Acoustical Patents . . . 97 Available Literature . . . . . . . . . . . 124

. . . . . . . . . . . . . . . . . . . . . . Sound Track 100 Shopping the Audio Market 126 ..... . . . . . . . . . . . News of the Sections 104 Message From the President 128

EDITORIAL BOARD

D. M. Black C. R. Keith 3. D. Colvin E, L. Kent D. H. Cooper D. L. Klepper E. J. Foster J. H. Kogen M. B. Gardner K. Kramer 3. M. Hollywood D. S. McCoy P. Kantrowitz J. G. McKnight

Harry F. Olson Editor Evelyn A. Morris Production Editor

D. W. Martin H. E. Roys R. A. Moog M. R. Schroeder A. R. Morgan G. M. SessIer J. T. Mullin E. L. Torick R. E. Owen J. E. Volkmann A. P. 6. Peterson D. R. von Recklinghausen N. C. Pickering J. G. Woodward

Jacqueline Harvey Managing Editor Elizabeth Braham Copy Editor

Journal of the Audio Engineering Society. Volume 17, No. 1, January 1969. Published b i -month ly by the A u d ~ o Engineering Society and supplied t o all members i n good standing. Publication office, 104 Liberty Street Utica, N. Y. 13502. Executive office, Room 428, Lincoln Building, 60 East 42nd Street New York N. Y. 10017. Entered as second class ma i l a t t he post o f f~ce a t Utica. N. Y. Sub- scriptibn t o nonAembers. $22.50 per year. Copyright 1969 by t he Audio Engineering Society. The Journal is indexed i n the Applied Science &Technology Index. The Journal of the A u d ~ o Engineering Society hereby grants permission t o repr int i n part , any paper In this issue i f direct perrnlsslon is obtained f rom i ts author(s) and credlt 1s glven t o t he author(s) and th is journal. An author, or his research affi l iate may reproduce his paper i n f u l l c red t t~ng this journal. This permission is not assignable. The "Journal of t he Audio Engineering Society" and i ts cover design has been registered as a trademark In the United States Patent Off~ce.

* i ! ? x

OFFICERS 1968-69 Benjamin B. Bauer President Frederick V. Hnnt Executive Vice-President George W. Bartlett Eastern Vice-President Harold 0. Kaitchuck Central Vice-President A. R. Soffel Western Vice-President John D. Colvin Secretary John J. Bubbers Treasurer

BOARD OF GOVERNORS Leo L. Beranek Donald B. Davis John P. Jarvis Keith 0. Johnson Hugh S. Knowles DeWitt F. Morris Harry F. Olson Robert E. Owen Donald W. Powers Daniel R. von Recklinghausen

COMMITTEE CHAIRMEN D. F. Morris Admissions D. R. von Recklinghausen Awards A. R. Soffel 36th Convention G. W. Bartlett 37th Convention J. G. Woodward Convention Policy B. B. Bauer Executive Committee J. Harvey Exhibits J. J. Bubbers Finance J. D. Colvin Historical F. V. Hunt Laws & Resolutions J. D. Colvin Library J. P. Jarvis Membership L. L. Beranek Nominations F. V. Hunt Publications Policy D. W. Powers Sections H. E. Roys Standards D. B. Davis Sustaining Memberships W. H. Freitag Tellers

SECTIONS Japan Los Angeles - Midwest * New York San Francisco Washington

ADMlNlSTRATlON Dorothy H. Spronck Executive Assistant

c*~*. SOCIETY COMMUNICATIONS Manuscripts, editorial and advertising correspondence should be sent to Editorial Offices, Audio Engineering Society Journal, 124 East 40th Street, New York 10016. Address all other Society business to the Audio Engineering Society, Room 428. Lincoln Building, 50 East 42nd St., New York, N.Y. 10017. Membership information and back copies n a y be obtained from either office.

JOURNAL OF THE

AUDIO ENGINEERING SOCIETY VOLUME 17 NUMBER 2 APRIL 1969

ARTICLES

Loudspeaker Phase Characteristics and Time Delay Distortion: Part 2 Richard C. Heyser 130

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . hTo Coded Signals H. S. Morris 13s

Compatibility of Stereo Recordings and Monaural Playback I. J . Sobel and Ronald Knuebel 143

. . . . . . . . . . . . . . . . The Gain of a Sound System C, P. Boner and R. E. Boner 147

Aco~istical Modeling as a Tool in Problem Solving . . . . . . . . . Leo L. Beranek 151

Sound Reinforcement for Banq~iet Halls, Ballrooms and Conference Rooms G. E. Horn. P. G. Tandy and Percy Wilson 156

. . . . . . . . . . . . . . . . Mass Prod~iction of Prerecorded Tapes Thomas D. Everett 165

Magnetic Recording Tape: The Influence of the Magnetic Coating Thickness . . . . . . . . . . . . . . . . . . . . . . . . . . Upon Signal Parameters William A. Manly, Jr. 175

Mod~ilation Distortion in Loudspeakers . . . . . . . . . . . . . . . . . . Paul W. Klipsch 194

LETTERS TO THE EDITOR

Thin Rilaminar Piezodisks Used as Microphone and Telephone Membranes J. Roos and J. Koorneef 174

Acoustical Problenis in Non-Verbal Communication . . . Harold Burris-Meyer 175

DEPARTMENTS

Message from the President . . . . . 172 News of the Sections . . . . . . . . . . . 238

Review of Acoustical Patents . . . . 208 Membership Information . . . . . . . 242 Convention Previea . . . . . . . . . . . 216 Shopping the Audio Market . . . . . 250

. . . . . . . . . . . . Sound Track . . . . . . . . . . . . . . . . . . 234 Available Literature 252 . . . . . . . . . . . . . . . . . . . . . Editorial 256

EDITORIAL BOARD

D. M. Black C. R. Keith B. W. Martin H. E. Roys J. D. Colvin E, L. Kent R. A. Moog M. R. Schroeder D. M. Cooper D. L. Mepper A. R. Morgan G. M. Sessler E. J. Foster J. H. Kogen J. T. Mullin E. L. Torick M. B. Gardner K. Kramer R. E. Owen J. E. Volkmann 5. M. Hollywood D. S. McCoy A. P. G. Peterson D. R. von Recklinghausen P. Kantrowitz J. G. McKnight N. C. Pickering J. G. Woodward

Harry F. Olson Editor Jacqueline Harvey Managing Editor Evelyn A. Morris Production Editor Elizabeth Braham Copy Editor

Journa l o f t h e Aud io Eng ineer ing Society. Vo lume 17, No . 2, Apr i l 1969. Pub l i shed bi -m0ntb: l ' by t h e Auciio E n g i n e r - f r ~ g S o i i e t y a n d supp l ied t o a l l m e m b e r s In good s tand fng . P u b l c a t ~ o n o f f l z ~ , 104 L ~ b e r t y S t ree t . U t i ca , N. Y . 13502. Execui ive off ice. R o o m 428, L lnco ln B u l l d l n g . 60 East A?"..' Street New York N. Y. 10017. Entered as second c lass m a i l a t t h e post o f f i ce a t U t l ca . N. Y. Sb1:- s c r i p t b n t o nonmen lbers , $22.50 per year. Copyr igh t 1969 by t h e A u d ~ o E n g ~ n e e r i n g S o c i e t y !rmk Journa l IS indexed ~n t h e App l ied Science & Technology Index. ?he Journa l of the Aud io E n g i n e e r ~ n g Society hereby g r a n t s permiss fon t o repr ln t i n p a r t , a r i paper i n t h i s issue i f d i rec t perrn iss lon i s o b t a ~ n e d f r o m i t s author(8) a n d c r e d i t IS g i ven t o r n a ~ i t h o r ( s ) a n d th fs journal . An au thor . o r h ~ s research a f f f i a t e m a y reproduce h i s p a p e r ir: i;:. c r e d i t f n g t h ~ s journal . Th is p e r m i s s ~ o n is n o t assignable. The "Journal o f t h e Aud io Eng ineer ing Society" a n d i t s cover d e s ~ g n h a s been registered as 2

t r a e e m a r k in the Un i ted States P a t e n i Of+ ce.

OFFICERS 1968-69 Benjamin B. Bauer President Frederick V. Hunt Executive Vice-P~esidenl George W. Bartlett Eastern Vice-President Harold 0. Kaitchuck Central Vice-President A. H. Soffel We\tern Vice-President John D. Colvin Secretary John J. Bubbcrs rreacurer

BOARD OF GOVERNORS Leo I;. Beranek Donald B. Davis John P. Jarvjs Keith 0. Johnson Hugh S. Knowles DeWitt F. Morris Harry P. Olson Robert E. Owen Donald W. Powers Daniel R. von Recklingharrsen

COMMITTEE CHAIRMEN D. F. Morris Admissions D. R. von Kecklinghar~sen Awards A. R. Soffel 36th Convention G. W. Bartlett 37th Convention J. G. Woodward Convention Policy B. B. Bauer Exccutive Committee J. Harvey Exhibits J. J. Rubbers Financc J. D. Colvin Historical F. V. Hunt Laws & Resolutions J. D. Calvin Library J. P. Jawis Membership 1,. 1,. Beranek Nominations F. V. Hunt Publications I'olicy D. W. Powers Sections H. E. Roys Standards D. B. Davis Sustaiiling Memberships W. H. Freitag Tellers

SECTIONS Japan * Los Angeles Midwest New York San Francisco Washington

ADMINISTRATION Dorothy H. Spronck Executive Assistant

SOCIETY COMMUNICATIONS Manuscripts, ed~torial and advertising corrcspondcncc qhould be sent to

a Editorial Offices, Audio Engineering Society Journal, 124 East 40th Street, New York 10016. Addrew all other Society busines5 to the Audio Engineering Soc~ety. Room 428, Lincoln Building, 60 East 42nd St. New York, N.Y. 100 17, Membership information and back copies may be obtained from either office.

JOURNAL OF THE

1UD10 ENGINEERING SOCIETY VOLUME 17 NUMBER 3 JUNE 1969

ARTICLES

Apparatus for Gcnerating Serial Sound Strnch~rcs . . . . . . . . . . Hugh T,e Caine 258

An Electronic l'iano . . . . . . . . . . . . . . . . . . . . P. R. Dijhslerhuis anti T. Verhey 266

Syochronuus Telcvisio~l Sound Kccording . . . . . . . . . . . . . . . . . . Michd Galrnet 272

Stereo,/Mono Disc Co~npatihility: A Survey of the Problems .... 1. M. Eargle 176

The Le>udness Balance of Andio Broadcast Programs . . . . . . . . . Ernst Relper 282

. . . . . . . . . . . . . Design of a Myoelectric Signal Conditioner Y. S. C hildress 286

.... Some Promising Nem Technicloes in Hearing Ke5earch Fdnlund M. Glascr 292

Applications of the Audio Operatianat Amplifier to S l ~ d i o Use Ralph Gittleman 298

. . . . . . . . . . Polyester and Acetate as Magnetic Tape Backings nelos A. 611e1s 303

High Density Disc Recording Systen~s . . . . . . . . . . . . . . . . . . . . Leo M. Levens 304

Musical Flames . . . . . . . . . . Mi. R. Babcock. K. L. Baker and A. G. Cattaneo 312


WusicaP li~sirnments with Electronic 4rriplilicatitrn oP Tone Modification EarleL Kent 316

. . . . . . . . . . . . . . . . . . . . . . . . . . E1cctra)nic Speech Comprewiou ITideo Sco 320

. . . . . . . . . . . . . . . . . . . . Legal Aspects of Noise Control F'rcderic P. Houston 324

DEPARTMENTS

M-essage from the President . . . . . 338 Sound Track . . . . . . . . . . . . . . . . . . 366

36th Convention . . . . . . . . . . . . . . . 332 Membership Tnformation . . . . . . . 370

Co~npletc Convention Program . . 342 Shopping the Audio Marker . . . . . 378

. . . . . . . . . . . . Review of Acoustical Patents . . . . 356 Available Literature 381

News of thc Scctions . . . . . . . . . . . 362 Editorial 384 . . . . . . . . . . . . . . . . . . . . .

EDITORIAL BOARD

D. M. Black J. M. Hollywood J. G. McKnight H. E. Roys J. D. Colvin P. Kantrowitz D. W. Martin M. R. Schroeder D. H. Cooper E. L. Kent R. A. Moog C. F. Swisher J. M. Eargle D. L. Mlepper A. R. Morgan E. L. l'orick E. J. Postcr J. H. Kogen J. T. Nlullin J. E. Volkmann M. B. Gardner K. Kramer R. H. Owen D. R. von Recklinghausen J. R. Harris D. S. McCoy A. Y. G, Peterson J. G. Woodward

Harry I?. Olson Editor Jacqueline Harvey Managing Editor Evelyn A. Morris Production Editor Elizahcth Braham Copy Editor

Journa l o f t h e A u d i o Ene lneer ing Society. Vo lume 17. No. 3 , J u n e 1969. Published bi-rrlontlr ly by t h e Auillr, L r~gar~ee ,~og : Suclety a n d buppliecl t o a l l r i~en lbc r ; 1 r1 g o o d s t a r ~ d l n g P u b l ~ c a t l u i ~ off,:c., 104 L jber ty Street , U t j i a . N. Y. 13502 Execut ive office. Room 328. L l n c o l n Uui ld lng. 60 Ca5t 3.1rv1 Street , N e w York, N . Y 10017 Lr i te red as seconcl cla.,s i r ia l l a t t h e post o f f ~ c e a t Ut lcd. N Y Sub i c i ~ p t ~ o ~ ~ to i ~ o n r n c r l i b e r s , $22 .50 per year C o p y r ~ z h t 1969 by the A u d ~ o E n g ~ n e e r i n g S o c ~ e t y , Ttr r Journa l 15 ( r ldexed In t l i e Applied S c ~ e n c e & Technology Index. The Journd l o f t h c Allcl lo t r i g ~ n f e t ~ n g Society he tehy grdr1t5 pc rn i l ss lon t o r c p r ~ r l t In par t . ar:: r laoer I r l th i5 15iuc ~f d l r ~ ~ f D e l l r l l i ~ , l ~ n 15 obt . i~r ,ed f t o r r l I ~ S i l u t l l o r (s ) i l l i d c re i l i t IF EiVC'll t o f h e , ~, ~ l ~ t h o r ( ; j .lnd thrs jou rna l . Arl ~ u l t i o r . u r h ~ r r e i c a r c h affllr,lte n l a y reprod l l ce hl, pdpe! i n !uli iredltlng; t h i ~ lou rnn l Th,? prlnllsc,!on I-, n o t a i i l g n a h l e Th r "Journa l of the A u d i o E n g i n e e r ~ n g Society" an(! ~ t s rovr l r c les~gr i ha? been registeret! 31 a t rade i r ia rk (11 t lre O n ~ i c r i State:, l',rtent O f f l c t

k

OFFICERS 1968-69 Benjamin B. Bauer President Frederick V. Hunt Executive Vice-President George W. Bartlett Eastern Vice-President Harold 0. Kaitchuck Central Vice-President A. R. Soffel Western Vice-President John D. Colvin Secretary John J. Rubbers Treasurer

BOARD OF GOVERNORS Leo L. Beranek Donald B. Davis John P. Jarvis Keitlt 0. Johnson Hugh S. KnowIes DeWitt F. JIorris Harry F. Olson Robert E. Owen Donald W. Powers _ Daniel R. r on Recklinghausen

COMMITTEE CHAIRMEN D. F. Morris Admissions D. R. von Recklinghaosen Award3 G. W. Bartlett 37th Convention H. S. ,4llen, 3r. 38th Convention J. G. Woodward Convention Policy B. B. Barrer Executive Committee J. Harvey Exhibits J. J, Bubbers Finance J. D. Colvin Historical F. V. Hunt Laws & Resolut~ons J, D. Colvin Library J. P. Jarvis Membership L. L. Beranek Nominations F. V. Hunt Publications Policy D. W. Powers Sections H. E. Roys Standards D. B. Davis Sustaining Menlberships W. H. Freitag Tellers

SECTIONS Japan Los Angeles * Midwest = New York San Francisco * Washington

ADMINlSTRATlON Dorothy H. Spronck Execurive Assistant

SOCIETY COMMUNICATIONS Manuscripts, editorial and advertising correspondence should be sent to Editorial Offices, Audio Engineering %;iety Journal, 124 East 40th Street. ?%P+ York 10016. Addreas all other Society business to the Audio Engineering Society. Room 428. Lincoln Building. 60 East 42nd St.. New York. N.Y. 10017, Membership information and back copies may be obtained from either office.

JOURNAL OF THE

AUDIO ENGlNEERlHG SOCIETY VOLUME 17 NUMBER 4 AUGUST 1969

ARTICLES

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electronic hlosic: 1988 Daniel W. Martin

. . . . . . . . . . . . . . . . . . . . . . . . . . . Hoane Entertainment: 1988 Hat-I-y F. Olson

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Commanications: 1988 J. R. Pierce

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sound Reinforcement: 1988 C. P. Boner

Some Techniqrres Toward Better Stereophonic Perspecti~e . . . . . . B. B. Bauer

Performance Characteristics of the Colnrnercial Stereo Disc . . . . John Earg1.e

A New Concept for a Capstan Drive System for Professional and Home Tape . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Recorders Arturo L. Stosberg

An Fill Tclen~etry Systern for Transnaitting Psycho-Plqsical Data J. A. Boehrn, IIL

. . . . . . . . . . . . . . . . . . . . An Electronic ;2lnric Learning System Victor J . Blong

A Real-Time kloltipartial Waveform Analyzer-S~nthesizer David Luce and Melville Clark. Jr .


Some Characteristics of Jr~nctior~ FETs in the Linear Region . . David Campbell 445

Comments on "Self-Contained Condenser hlicrophones" (Alan Dauger and Chal-les IF. Swirher. JAES 16. 464 (1968)) . . M. S. Hawley 447

Reply to "Comments on 'Self-Contained Condenser Microphones' " . . . . . . . . . . . . . . . (M. S. Hawleq. JAES 17. 447 (1969)) Chai-les F. Swisher 44'

Comanents on ".Modulation Distortion in T,oudspeakersW . . . . . . . . . . . . . . . . . (Paul W. IClipsch. JAES 1'7; 194 (1969)) 7. S. Cole, Sr. 448

Reply to "Comments on 'Modulation Distortion in Loudspeakers' " . . . . . . . . . . . . . . . . . (T. S. Cole. Sr., JAES 17, 448 (1969)) Paul W. Klipsch 449

Conaments on "Better Aural Prosthesis" (Benjamin B. Bauer. JAES 17. 172 (1969)) . . . . . . . . . . . . . Alex J . Szecsod) 449

DEPARTMENTS

. . . . Messa,oe ft-om the President . . . . 450 Shopping the Audio hlarket 4X0

. . . . . . . . . . . News of the Sections . . . . . . . . . . 456 Available Literature 486 . . . . . . . . . . . . . . . . . . . . . . . Sound Track 462 Membership Infoi-mation 444

. . . . . . . . . . . . . . . . . . . . Reviea of Acoustical Patents . . . 47"L Eilitol-ial 50i; . . . . . . . . . . . . . . . . . . . Obituaries 504

EDIT ORlAL BOARD

D. M, Black J. M. Hollywood J. G. McKnight H. E. Roys J. D. Colvin P. Kantrowitz D. W. Martin M. R. Schroeder D. H. Cooper E, L. Kent R. A. Moog C. F. Swisher I. M. Eargle D. L. Klepper A. R. Morgan E. L. Torick E. J. Foster J. H. Kogen J. T. Mullin J. E. Volkmann M. B. Gardner K. Kra~ner R. E. Owen D. K. von Recklinghausen J. R. Harris D. S. McCoy -4. P, G. Peterson J. G. Woodward

Harry F. Olson Editor Jacqueline Harvey Managing Editor Evelyn A. Morris Production Editor Elizabeth Braham Copy Editor

j o u r n a l of t h e A u d i o Eng ineer ing Society. V o l u m e 17, N o . 4. A u g u s t 1969. P u h l ~ s h e d b i - m o n t h ! , by t i re Audio Engineer j r rg Society a n d s u p p l ~ e d l o a l l n ~ e m h e r s i n good s t a n d i n g Pub i i ca t ion of f ice 10.1 Liberty Street , U t i ca . N. Y. 13502. E x e c u t ~ v e off ice, R o o m 428, L i n c o l n Bu i ld ing . 60 East Sn;r Street , Ne:v York, N Y. 10017. En te red as second c lass ( n a i l a t t h e pos t of f ice a t U t i ca . N Y. Su:;. s c r p t l o n to nonrnerr ibers. $22 .50 per year. Copyr ight 1'16') by t t i e Aud lo Eng ineer ing Society. l t ? t Jourr ia l I S ~ n d e x e t ! I" t h e App l ied Science &Techno logy Index. The Journa l of t h e Aud io E n g ~ n e e r i n g Society hereby g r a n t s permis5 lon t o r c p r l n i Irl pa r t , an; paper Irl th i5 i s i u e i f d i rec t perrn iss lon 1s obtained iron-) ~ t s a u t h n r i i j and c red i t is g i ven t o t h ~ aut t lo r i s ) and th ls l o u i n a l A i l au t t l o ! , v r 171s lesearch af f l l la t f m a y reproduce his paper i n f u

j c r e d i t i n g t h i s jou rna l T h ~ s permission 1s n o t a i i l g n a b l e .

1 T h e "Journa l of t h e A u d i o E n g ~ n e e r i n g Socfiety" and i t s cover des ign t 'a i been registered a: r t ra i ier l tark in t i l e U n ~ t e d S ta tes Patent Office :

OFFICERS 1968-69 Benjamin B. Bauer President Frederick V. Hunt Executive Vice-President George W. Bartlett Eastern Vice-President Harold 0. Kaitchuck Central Vice-president A. R. Soffel Western Vice-President John D. Colvin Secretary John J. Bubbers Treasurer

BOARD OF GOVERNORS Leo L. Beranek Donald B. Davis John P. Jarvis Keith O. Johnson Hugh S. Knowles DeWitt F. Morris Harry F. Olson Robert E. Owen Donald W. Powers Daniel R. von Recklingharlsen

COMMITTEE CHAIRMEN D. F. Morris Admissions D. R. von Recklinghausen Awards G. W. Bartlett 37th Convention H. S. Allen, Jr. 38th Convention J. G. Woodward Convention Policy B. B. Bauer Executive Committee J. Harvey Exhibits J. J. Bubbers Finance J. D. Colvin Historical F. V. Hunt Laws & Resolutions J. D. Colvin Library J. P. Jarvis Membership L. L. Beranek Nominations F. V. Hunt Publications Policy D. W. Powers Sections H. E. Roys Standards D, B. Davis Sustaining Memberships W. H. Freitag Tellers

SECTIONS Japan Los Angcles = Midwest * New York * San Francisco 8

Washington

ADMINISTRATEON Dorothy H. Spronck Executive Assistant

SOCIETY COMMUNICATIONS Manuscripts, editorial and advertising correspondence should be sent to Editorial Offices, Audio Engineering Society Journal, 124 East 40th Street, New York 10016. Address all other Society business to the Audio Engineering Society, Room 428, Lincoln Building, 60 East 42nd St., New York, N.Y. 10017, Membership information and back copies may be obtained from either ofice.

JOURNAL OF THE


ARTICLES

Use of Solid State Transdocelrs In 31echanics and Acoustics . Warren P. Mason

4n Inlproved Theater Type Loudspeaker System . . . . . . . . . . John K. Hilliard

Design Parameters of a Dnal Woofer Loudspeaker Syste~li . . Edward M. Long

Experimental Determination of Lou-Freqoency Loudspeaker Parameters J . Robert A4hley and Mark D. Swan

. . . . . . . . . . . . . . . . . . . . The Ear As A Measuring Instrument Harvey Fletcher

Music as a Source of Acoustic Trauma Charles P. Lebo and Kenward P. Qliphant

Transducer Development for the Artificial Heart or Heart Assist Devices Philip Kantrowitz

"Symbiotic" R-Wave Monitor . . Thom;~s W. Argy and William H. Greenbaum

. . . . . . . . . . . Broadband Equalization of Small Meeting Rooms Daniel Queen

Sound Amplification Systems for San Diego All American Stadium Wilfred A. Malmlund and David L. Klepper


Measuring a Tape Reprod~icer with IEC-Response, Using NAB-Response Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tape John G.McKnight 572

. . . . . . . . . . . . . . A Differential Telephone Repeater Circuit Joseph H. Dessen 572

Com~nents on Better Aural Prosthesis

. . . . . . . . . . . . . . . . (Benjamin B. Ba:ier. JAES 17, 172 11969)) Anne Harrison 578

DEPARTMENTS

. . . Message from the President . . . . 582 Review of Aco~lstical Patents 622 . . . . . . . . . . . News of the Sections . . . . . . . . . . 590 Available Literature 630

. . . . . . Sound Track . . . . . . . . . . . . . . . . . 594 Membership Information 626 Exhibits Preview . . . . . . . . . . . . . 600

EDITQRIAL BOARD

D. R1. Black J. M. Hollywood J. G. McKnight 8. E. Roys J. D. Colvin P. Kantrowitz D. We Martin M. R. Schroeder D. H. Cooper E. L. Kent R. A. Moog C. F. Swisher J. M. Eargle D. L. Klepper A. R. Morgan E. L. Torick E, J. Foster J. H. Kogen J. T. Mullin J. E. Volkmann M. B. Gardner K. Kramer R. E. Owen D. R. von Recklinghausen J. R. Harris D. S. McCoy A. P. G. Peterson J. G. Woodward

Robert 0. Fehr Editor Jacqueline Harvey Managing Editor Evelyn A. Morris Production Editor Elizabeth Braham Copy Editor

Harry F. Olson Editor Emeritus

Journa l of t h e A u d i o f n g i n e e r ~ n g Society. Vo lume 17, N o . 5 , Oc tober 1969 P u b l ~ s h e d b l -mont ! : l i

by the Aud io E n g ~ n e e r ~ n g S o c ~ e t y a n d supp l ;ed t o ali m e m b e r s I n gooci s t a n d ~ i l g . Publ~ca: ion oV!ce , 104 L ~ b e r t y Street U t c a , N Y. 13502 E x e c u t ~ v e o f f c e , R o o m 428. L inco in B u l d t n g . 60 East '12n: Street , Ne 'a York, N . Y. 10017. Entered as second c lass m a i l a t the post o f f c e a t U t i ca . N. Y . Su.2- s c r p t i o n to nonmembers, $22 50 p e r year . C o p y r g i ~ t 1969 by t h e Aud lo t n g i n e e r l n g boc le ty . 7'1%

Journa l 18 ~nc lexed ~n the App l ied S c ~ e n c e & T e c h n o l o g y Index. The Journa l of the A u i i ~ o i n g ~ n e e r ~ n g Soclety hereby g r a n t s perrn iss lon t o r e p r l n t In par t . a n ) [paper ~n t h ~ s Issue ~f d i rec t pe rmlss lon 18 obtained f r o m ~ t s au thor (s ) anci c r e d ~ t I S g l ven t o t h e author (s j drld t h l s l o u r n a l . An au thor , o r h ls research a f f l l l a te m a y veproduce h ! s paper i n fut c r e d ~ t ~ n g t h ~ s jou rna l T h ~ s permiss !on I S not assignable The "Journa l o f t h e A u d i o E n g ~ n e e r i n g S o c ~ e t y " and i t s cover d e s ~ g n h a s been r e g ~ s t e r e d as 3 t rademark, In the U n ~ t e i i S t? tes Patent O f f \ c e

OFFlCERS 1969-10 Frederick V. Hunt President George W. Bartlett Fxecut~be Vice-Prestdent Marry A. Pearson Ea9tern V~ce-President James El. Kogen C c n t ~ al V I L ~ PI csrdent Hugh S. Allen, Jr. Westeln V~ce-f '~e \~dcnt Donald J. Blonkelt Secretal y lo1111 J. Uubbers 1 r e ~ ~ a ~ 1 r c . t

BOARD OF GOVERNORS Bcnja~nirr B. llauer Leo L. Bera~rek Duarre R. Cooper Dowald U. Davis Robert O. Fehr Kcittr 0. Johnson Hohert E. Owen Daniel R. von Recklinghausen S. Allen Selby 111 Philip B. Williams

CONlMllTTEE CHAIRMEN K. b. Owen Adnils~1on3 L. L. Beranck Awards H. A. Pearson 39th C onvention H. S. Allen, Jr. 38th Convent~on C. N. Uartlett Convcnt~on Pollcy F. V. Hunt Exccut~ve Comm~ltec J. Harvey E x h ~ b ~ t ? J. J. Bnbbers F ~ n a n c e J. D. Colvin I-iistor~cal C. W7. Bartlett Laws & Kesolutlonj \I. + H. Freitag I rbrar y S. A. Selby 111 M c m b c ~ s h ~ p B. H. Hauer Nommation5 6. W. Bartlett Pobllcat~on\ Policl D. W. Powers Sect~ons H. b. Roys Stdnddrd5 D. K. Davi5 Sustam~ng M c m b e ~ \hips M. 11. Freitag Tellel5

SECTIONS Canada * Japan Los .Angeles Midwest New York San Francisco * Washington

ADMlNlSTRATlON Dorothl H. Spronck Adnlln15rratlve Scciet;r~y

SOCIETY COMMUNICATIONS Manuscripts, editorial and advertising correspondence should be sent to Editorial Offices, Audio Engineering Soc~ety Journal. 124 East 40th Street, New York 10016. Address all other Society business t o the Audio Engineering Society, Room 428. Lincoln Building, 60 East 42nd St.. New York, N.Y. 10017, Membership information and back copies may be obtained f rom either office.

JOURNAL OF THE

AUDIO ENGINEERING SOGIETY VOLUME 17 NUMBER 6 DECEMBER 1969

ARTICLES

. . . . . . . . . . . . . . . . . . A Studio Tape Recorder of Novel Design Z o l ~ a r ~ Vajd;~ The Measurement and Subjective Assessment of Modulation Noise

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . in Magnetic Recording E. G. .l'rendcll Calibration of Microphones hy the Principles of Similarity ancl Reciprocity

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (A Reissue) Harry F. Olson Talking and Listening Levels in Verbal Co~nmonication-lanportance of

. . . . . . . . . . . . . . . . . . . . . . . Spccifying Parametric Values Mark B. Gal-dnel- Means for Visoal Pndicatioll of the Overload 1,imit fcrr Audio Power

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Amplifiers Luciano Foa A New music and Sound Effects System for 'd'heatrical Prc~ductions

Dan Dugan A Trailerized Acoustic Shell for Outdoor Performances of Symphony Orchestra

. . . . . . . . . . . . . . . . . and Concert Opera Christopheu JaKe. Peter Quaintance and Charles Swisher

A Dual-&and Audio Linriter . . . . . . . . . . . James I. Noble and Robert .I. Birtf Analyzing 1,ondspeaker 1,ocatioo for Sound Reinforcelllent Systems

Don Davis


Standardization of $5 in. Master Tapes for hilosicassette I'rodoction . J . Meli-; 690

A Proposal for Updating the Half-Track Magl~clic Tape I'ormat Richar-il S. Ficld. Jr. 690

. . . . . . . . . . . . . . Toward a Morc Accurate Spatial Environment Pelel- Scheiber 690 li~rrtller Comments on "Modollation Distortion in Loudspeakers"

. . . . . . . . . . . . . . . . . . . (Pard Klipsch, JAES 17. 2 (1969)) Arturo E. Stosberg 691 Comments on "A New Concept for a cap st;^^ Drive Systern for Professional

and Audio Tape Recorders" . . . . . . . . . . . . . . . . . . (Arturo E. Stoshcrg, JAES 17, 4 (1969)) C. S. Cole, Sr. 694

Reply to "Comments on 'A New Concept for a Capstan Drive System for Professional and Audio Tape Recorders' "

. . . . . . . . . . . . . . . . . . (T. S. Cole, Sr.. JAES 17, 6 (1969)) Artul-o F,. Stosberg 695

DEPARTMENTS . . . . . . . . . . 37th Convention . . . . . . . . . . . . . . 696 News of the Sections 738

C'ornpletc Convention Program . 704 Shopping the Audio Market . . . . 742 Sound Track . . . . . . . . . . . . . . . . . 720 Membership information . . . . . . 746

. . . . . . . . . . . . . . . . . . . . Rcview of Acoustical Patents . . . 724 Editorial 754 . . . . . . . . . . . Available J'iteralure . . . . . . . . . . . 732 index to Volume 17 '755

. . . . . . . . . . . . . . . . . . . Ohiltlaries '760

EDITORIAL BOARD

D. M. Black R. C. Heyser D. S. McCoy ,\. P. G. Peterson J. D. Colvin J. M. Hollywood J. G. McKnight 11. E. Rays U. M. Cooper P. Kantrowitz D. W. Martin M. R. Schrocdcr .I. N. Eargle E. L. Kent R. A. Moog C. F. Swisher E. J. Foster D. L. Kleppcr A. R. Morgan R. I,. l'orick M. B. Gardner J. H. Kogen a. T. Mullin D. R. von Recklinghausen J. R. Harris I<. Kramer R. E. Owen .8. G. Woodward

Robert 0. Fehr Editor Jacqt~eline Harvey Managing Editor Evelyn A. Morris Production Editor Elizabeth Braham Copy E d ~ t o r

Harry F. Olaua Editor F m e r i t ~ ~ \

Journal of the Audio Engineering Society Volutne 17. No. 6 . December 1969. Publ~shed hi-monthij. b y the A u d ~ o Engir~crrfng Souety arrrl srlppllecl to all mer-i~bers In good 5tariding P l lh l rca l~on o f f i i i :

104 L ~ h e r t y Street, Utrca . N Y 1,3502. F x e c u l w e u f l t ~ e . R o o m 428. Lrnr:oln R u ~ l c t ~ n g , bO En i t 4:;n't S t r r . c t , NEW Y o l k , N Y. 10017 tiitr:red as ;cconcl clay$ rr(a11 a t the po;t office a t IJtlca, N . Y. Slit;- ii r ~ u t l o n to noiin~e~~,hers, $? 5 0 r:er year Copyrlght I'iO'i by t h e A u c l ~ o Eng;z i ,eer~t rg Sor.ielf. 7tt. J o r l t n a l I; ~rrclcxeil I r l Itre A p p l ~ e d Science K Technology Index. l h c J o u r n a l of tlie A l l i l ~ o F n g ~ n i ~ c r i ~ r g S r i i ~ e t y hcrct iy grants permls\iuri to r e l j r l r r l In p , l r t , d i l ;

IJaper ! r l t t r i i I\\!le ~f i11rci:t perrru\,,lorr ji nbla~rred froill ~ t s auttror(s1 a n d ~ l e i l ~ t IS elveri to :ire a ~ ~ t h o r ( i ) arirl t h 1 5 joi i rnal . Arr ~ ~ u t h o r , o i Ills ieienrch a f f ~ l i a t e rrlay ~epruclure h i s paper In f t i i i c r e d ~ t ~ r ~ g t i l l - j o u r ~ ~ a l I hi5 p e r r i ~ i ~ , i ~ o n IS not ;~<.i ,grlable Tlie "Journa l of the A u d ~ o t n g ~ n e e r ~ n g Society" a n d its cove) design has b e e n registered a i ,: tradernark 10 tiic I l n l t ed State5 P a t e n t O f 1 1 ~ e .,..?;;*,, ...-.,>-

OFFICERS 1969-76 Frederick V. Bunt President George W. Bartlett Executive kice-PresidenS Harrj A. Pearson Eastern Vice-president Janles H. Kogen Central Vice-president Hugh S. Allen, Jr. Western Vice-President Donald .I. Plnrlkett Secretary John J. Bubbers Treasurer

BOARD OF GOVERNORS Benjamin I. Bauer Leo L, Beranek Dume PI. Cooper Donald B. Davis Robert O. Fehr Keith 0. Johnson Robert E. Owen Daniel R. von Recklinghaosen S. Allen Selby I11 Philip IB. Williams

COMMITTEE CHAIRMEN R. E. Owen Admissions L. C, Beranek Awards H. A. Pearson 39th Convention H. S. Allen, Jr. 38th Convention G. W. Bartlett Convention Pollcy F. V. Hunt Executive Committee J. Harvey Exhiblts J. J. Eubbers Flnance 3. D. Coivin Hi3101 ~ c a l 6;. \i. Bartletf Laws & Resoiutions \V- H. Freitag Librarq S. 4. &lby 111 Membership B. B. Bauer Nominations G, W. Bartlett Publications Policg D, ?%. Powers Sections PI. E. Moys %andarcis PP. E. Davis Sustalnlng Memberships W. H, Freitag Tellers

SECTIONS Cansdra. * Japan * Los Angeies RIidwest New Torli Salr Francisco *

n auhingtorr

ADMINfSTRATIQN Dorothy HP. Spronck Lldrnioisrra~i\e Secretarj

SOCIETY COMMUNICATIONS Manuscripts. editorial and advertising correspondence should be sent to Editorial Offices, Audio Engineering Society Journal, 124 East 40th Street, New York 10016. Addre~s all other Society bosiness to the Audio Engineering Society. Room 428. Lincoln Building, 60 Eahs d2nd St.. New York, N.Y. 10017. Membership information and back copies may be obta~nea from e~ther office.

JOURNAL OF THE

AUDlO ENGINEERIN VOLUME 18 NUMBER 1 FEBRUARY l97o

ARTICLES

.An Examination of Dropouts Occurring in the Magnetic Recording and . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reproduction Process William Van Keuren Z

-1 Brief History of the Recording Industry in the Soviet Union . . A. I, Archinov 2fi

Sound Systerns for Large ~Vultbporpose Halls in the Soviet Union A. A. Khrusche\ 2'

. . . . . . . . . . . Modulation Distortion in Loudspeakers: Part I1 Pal11 W. Klipsch 29

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Loudspeaker Voice Coils John King ?-

Development of a Versatile Professional Unidirectional Microphone Robert B. Schulein 4-

The Dian~ond as an Tiidustrial Material. With Special Reference to Phono Styli . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (Reissue) E. J. & M. V. Marcus $I

The Intelligibilitj of Speech Transposed Donnward in Freqnency by One Octake Ian B. Thomas and Francis E. Flabin 56

"Instant" Recording Studios using Prefabricated Acoustical Panels Allan P. Smith h

LETTERS TO THE EDITOR . . . . . . A N e w Device for Speech Pause Analysis Ben Re~ch and Chris Sharma 65

Apparatus for a New Stereopsychoacoustics-Grounded Musical Technology David S. Goldsmith 68

4 More Useful Form of the Minimum Loss Inlpedance Matching Pad Ralph Tounsle) '-

DEPARTMENTS

Review of Acoustical Patenth 87 Available Literature . . . . . . . . . . 9" . . . . . . , . . . . . . . . . . . . Xews of the Sections 92 Shopping the Audio Marker 100

. . . . . . . . . . . . . . . . . . . Sound Track 9 4 ;\/lenibership Information ii>:f . . . . . . . . . . . . . . . . . . . Editorial 110

EDITORIAL BOARD D. M. Black R. C. Hey-ser D. S. McCoy A. P. G. Peterson J. D. Colvin J. M. Hollywood J. G. ~MeKnight H. E. Rays D. H. Cooper P. Kantrowitz D. W. Martin M. R. Schroeder J. M. Eargle E. L. Kent R. A. Moog C. P, Swisher E. J. Foster D. L. Klepper A. R. Morgan E. I,. Torick M. B. Gardner J. H. Kogen J. T. Mullin D. R. von Recklinghausern 3. W. Hxris K. Kramcr R. E. Owen J. 6. Woodward

Robert 0. Fehr Editor Jacqueline Harvey ,Managlng Editor Evelyn A. Morris Production Editor Elizabeth Braham Copy Editar


Journal of the Audio Engineering Society. Volume 18, No. 1. February 1970. Published bi-monthly by the Audio Engineering Society and supplied to all members in good standing. Publication office. 104 Liberty Street, Utica, N.Y. 13502. Executive office, Room 428, Lincoln Building, 60 East 42nd Street New York N.Y. 10017. Entered as second class mall a t the post office at Utica, N.Y. Sub. scripti'on to nonGernbers, $22.50 per year. Copyright 1969 by the Audio Engineering Society. The Journal is indexed In the Applied Sc~ence & Technology Index. The Journal of the Aud-io Engineering Society hereby grants permission to reprint i n part, any paper in this issue ~f d~ rec t perm~ssion is obtained from its author(s) and credit is given to the author(s) and this journal. An author, or his research affiliate may reproduce his paper i n fuIi crediting this journal. This permission is not assignable. The "Journal of the Audio Engineering Society" and ~ t s cover design has been registered as a trademark ~n the Un~ ted Statespatentdf f~ce. ey

OFFICERS 1969-70 Frederick F7. EIurit President George W. Bartlett Execntivc Vice-Presidenf

\ Harry A. Pearson Eastel n Vice-President James H. Kogen Central Vlce-President Hugh S. Allen, Jr. Western Vicc-Pre\rdent Donald J. Plunkett Secretary John I. Bubbers Treaslrler

BOARD OF GOVERNORS Ben jamin B. Uauer Leo ]IA. Beranek Duane H. Cooper Donald B. Davis Robert 0. Fehr Keith 8. Johnson Robert E. Owen Daniel R. von Recklinghausen S. Allen Selby 111 Plrilip B. Williams

COMMITTEE CHAIRMEN , R. E. Owen Admissions

L. L. Beranek Awards H. A. Pearson 39th Convention H. S. Allen, Jr. 38th Convention G. W. Bartlett Convention Policy P. V. Hunt Executike Comm~ttec 1. Harvey Exhibits J. J. Bubbers Finance J. U. Colvin Historical G. W. Bartlett Laws & Resolutions R . H. Freitag Library S. 2. Selby 111 Membe~sh~p B. B. Bauer Nominations 6. W. Bartlctt Publications Policy D. W. Powers Seclions H. E. Roys Standards D. B. Davis Sustaining Memberships VC. H. Freitag Tellers

SECTIONS Canada = Japan Los Angeles e

B1lidwest New York * San Francisco - FTaslrington

ADMINISTRATION Dorothy H. Spronck Administratwe Secretary

SOCIETY COMMUNICATIONS Manuscripts, editorial and advertising correspondence should be sent to Editorial Offices, Audio Engineering Society Journal, 124 East 40th Street, New York 10016. Address all other Society business to the Audio Engineering Society, Room 428, Lincoln Building, 68 East 42nd St., New York. N.Y. 10017, Membership information and back copies may be obtained from either office.

/ JOURNAL OF THE

NGlNEERlNG SOCIETY VOLUME 18 NUMBER 2 APRIL 19713

ARTICLES

Updating and Interpreting the Speech Interference I,evel (S11,) Jolin C. Web5te1 l lrt

. . . . . . . . . . . . . . . . . . . . . . . . . . 'Transportation Noise Sources R. C ' . Potter 1 I Y

. . . . . . . . . . . . . . . . . . . . . . . Infrasonic Thermistor Microphone Robert 0. Fehr 178

Reliability in Production Testing of Loudspeaker C'omponenh and Systems Donald S. Schroede~ and Fdhard M. Long l i 3

Design Considerations of Low-Noise Arrdio Input Circuitry for a Professional . . . . . . . . . . . . Microphone Mixer A. Uor~glas Smith and Paul H. M'ittman 140

A Rational Technique For Synthesizing I'seudo-Stereo From Monophonic Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Robert Orhan 157

. . . Octave-Band Spectral Distribution of Recnrdcd Mnsic Hcn~anlin B. Bauer 165

Transmission Lines 111 Studios . . . . . . . . . . . . . . . . . 0. Everett Wiedmann 174

A Sound Reinforcement Sy5teni for %loltiple Conference Roorrls Melvin S. Draper 184

Crosstalk Meassireinents on Magnetic IZecurding Heads . . . . Kohert E. Barbour 20;


lime-Di\ision Multiplex For Four-Channel FM . I)u,ine H Coopel 198

DEPARTMENTS

. . . . . . Exhibits Preview . . . . . . . . . . . . . 210 Mcnihet.ship Tnformation 231 . . . . . . . . . . Available Literature . . . . . . . . . . . 226 News of the Sections 2.10

. . . . . . . . . . . . . . . . . Sound l'rack 244

EDITORIAL BOARD

D. M. Black R. C. Heyser D. S. McCoy A. P. G. Peterson J. D. Colvin J. M. Hollywood J. G. McKnight H. E. Roys D. H. Cooper B. Kantrowitz D. W. Martin M. R. Schroeder 5. M. Eargle E. L. Kent R. A. Moog C. I?. Swisher E. J. Foster D. L. Klepper A. R. Morgan E. L. Torick M. B. Gardner J. H. Kogen J. T. Mullin D. R. von Rccklinghau~en J. H. Harris K. Kramer R. E. Owen J. G. Woodward


Harry F. Olson Editor Emcritus

Journal of the Audio Engineering Society. Volume 18 No. 2, April 1970. published bi-monthly by the Audio Engineering Society and supplied to all rneinbers in good standing. Publication office. 104 Liberty Street, Utica N.Y. 13502. Executive office, Room 428. Lincoln Building, 60 East 42nd Street. New York, N.Y. lb017. Entered as second class mai l at t h e post office a t Utica, N.Y. Sub- scriptlon t o nonmembers. $22.50 per year. Copyright 1969 by the Audio Engineering Society. The Journal is indexed in the Applied Science & Technology Index. The Journal of the Audio Engineering Society hereby grants permission to reprint i n part, any paper i n this issue if direct permission is obtained from its author(s) and credit is given to the author(s) and this journal. An author, or his research affiliate may reproduce his paper i n fu l l crediting -this journal. This permission is not assignable. The "Journal of the Audio Engineering Society" and i ts cover design has been registered as a trademark In the United States Patent Offlce.

OFFICERS 1969-70 Frederick V. Hunt President George W. Bartlett Executive Vice-President Harry A. Pearson Eastern Vice-President James H. Kogeu Central Vice-President Hugh S. Allen, Jr. Western Vice-Plesident Donald J. Plunkett Secretary John J. Bubbers Treasurer

BOARD OF GOVERNORS Benjamin B. Bauer Leo L. Beranek Duane H. Cooper Donald B. Davis Robert O. Fehr Keith 0. Johnson Robert E. Owen Daniel R. von Recklinghausen S. Allen Selby I11 Philip B. Williams

COMMITTEE CHAIRMEN R. E. Owen Admissions L. E. Beranek Awards H. A. Pearson 39th Convention M. S. Allen, Jr. 38Lh Convention CS* W. Bartlett Convention Policy F, V. Hunt Executive Com~nittee J. Harvey Exhibits J. J. Bubbers Finance 3. D. Colvin Historical 6. W. Bartlett Laws & Resolutions R. H. Freitag Library S. A. Selby HI Membe~ship B. B. Bauer Nominations 6. W. Bartlett Publications Policy D. W. Powers Sections 1%. E. Roys Standards D. B. Davis Sustaining Memberships W. H. Freitag Tellers

SECTIONS Canada 6 Japan * Los .4ngeles - Midwest . hTew York . San Francisco Washington

ADMINISTRATION Dorothy H. Spronck Administrative Secretary

SOCIETY COMMUNICATIONS Manuscripts, editorial and advertising - zorrespondence should be sent to Editorial Oflices, Audio Engineering Society Journal, 124 East 40th Street, New York 10016. Address all other Socisty business to the Audio Engineering Society, Room 428, Lincoln Building, 60 East 42nd St., New York, N.Y. 10017, Membership information and back copies may be obtained from either office.

JOURNAL OF THE

AUDIO EN61NEERlNG SOCIET VOLUME 18 NUMBER 3 JUNE 1970

ARTICLES

Tape Flux Measurement Theory and Verification . . . . . . . . . J. G. McKnight 250

Ribbon Velocity Microphones . . . . . . . . . . . . . . . . . . . . . . . . . . . Harry F. Olson 263

The Development of a Sandwich-Construction Loudspeaker System D. A. Barlow 269

Frequency Response Analysis of Phonograph Pickups on Calibrated Test Records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bernhard W. Jakobs 282

Perceptibility of Wow and Flutter . . . . . . . . . . . . . . . . . . . . . . . . . . . Hisao Sakai 291.;

The intelligibility of Filtered-Clipped Speech in Noise Ian B. Thomas and Russell J. Niederjohn 293

A Church Sound System Design ........................ G. R. 'K'hurmond 304

"invisible" Sound Reinforcement With 350 Microphones Peter W. Tappan and Robert F. Ancha 30'4

LETTERS TO THE EDITOR . . . . . . . . . . . . . . . . . . . . A Plea For Accurate Terminology Melvin C . Sprinkle 315

. . . . . . . . . . . . . . . . . . . . . . . . . A New Direct-Drive Phonomotor K. Kobayashi 316

DEPARTMENTS

Audio Standards Listing . . . . . . 3 17 Shopping the Audio Market . . 33; . . . . . . . . . . 38th Convention . . . . . . . . . . . . . . 322 News of the Section5 351;

. . . . . . . . . . . . . . . . . Complete Convention Program . . 330 Sound Track 362 . . . . . . . . Review of Acoustical Patents . . . 345 AvailableLiterature 36;

Membership Information . . . . . . 368

EDITORIAL BOARD D. M. Black R. C. Heyser D. S. McCoy A. P. G. Peterson J. D. Colvin J. M. Hollywood 3. G. McKnight H. E. Roys D. H. Cooper P. Kantrowitz D. W. Martin M. R. Schroeder J. M. Eargle E. L. Kent R. A. Moog C. F. Swisher E. J. Foster D. L. Klepper A. R. Morgan E. L. Torick M. B. Gardner J. H. Kogen J. T. Mullin D. R. von Recklinghausen J. R. Harris K. Kramer R. E. Owen 3. G. Woodward


Harry I?. Olson Editor Emeritus

Joui'nal of the Audio Engineering Society. Volume 18, No. 3: June 1970..Published bi-monthly by the Audio Eng~neerjng Soc~ety and supplied to al l members In good standing. Pub l~ca t~on office. 104 Liberty Street, Utlca, N.Y. 13502. Executive office, Roqm 428, Lincoln Bul ld~ng. 60 East 42nd Street. New York, N.Y. 10017. Entered as second class mall at the post office at Utica. N.Y. Sub- scription to nonmembers, $22.50 per year. Copyright 1969 by the A u d ~ o Engineering Society. The Journal is indexed in the Applied Science &Technology Index. The Journal of the Audio Engineering Society hereby grants permission to reprint i n part, any paper i n this issue if direct permission is obtained from i ts author(s) and credit is given to the author(s) and this journal. An author, or his research affiliate may reproduce his paper i n fu:! crediting-this journal. This permission is not assignable. The "Journal o f the Audio Engineering Society" and i ts cover design has been registered as a trademark i n the United States Patent Office. ^ "GCsk *gr:-T,*,

OFFICERS 1969-70 Frederick V. Hunt President George W. Bartlett Executive Vice-President Harry A. Pearson Eastern Vice-President James H. Kogen Central Vice-President Hugh S. Allen, Jr. Western Vice-President Donald 5. Plunkett Secretary John J. Bubbers Treasurer

BOARD OF GOVERNORS Benjamin B. Bauer Leo L. Beranek I lume H. Cooper Donald B. Davis Robert 0. Fehr Keith 0. Johnson Robert E. Owen Daniel R. von Recklinghausen S. Allen Selby 111 Philip &. Willian~s

COMMITTEE CHAIRMEN R. E. Owen Admissions L. I,. Beranek Awards H. A. Pearson 39th Convention H. S. AIlen, Jr. 38th Convention G. W. Bartlett Convention Policy E. V. Hunt Executive Committee J. Harvey Exhibits J. J. Bubbers Finance J. D. Colvin Historical G. W. Bartlett Laws 6( Resolutions W. H. Freitag Library S. A. SePby 111 Membership B. B. Bauer Sominations G. W. Bartlett P~lblications Policq D. W. Powers Sections H. E. Roys Standards D. B. Davis Sustaining Memberships W. H. Freitag Tellers

SECTIONS Canada * Japan Los Angelee Midwest * New York 0 San Francisco e

Washington

ADMINISTRATION Dorothy H. Spronck Administrat~ve Secretary

SOCIETY COMMUNICATIONS Manuscripts, editorial and advertising correspondence should be sent to Editorial Offices, Audio Engineering Society Journal, 124 East 40th Street, New York 10016. Address all other Society business to the Audio Engineering Society, Room 428, 12incoln Building, 60 East 42nd St., New York, N.Y. 10017, Membership information and back copies may be obtained from either office.

; JOURNAL OF THE

AUDIO ENGINEERING SOCIETY VOLUME 18 NUMBER 4 AUGUST 1970

ARTICLES

. . . . . . . . . . . . . . . . . . . . . Loudspeakers for Model lnvestigations Ales Boleslax 375

An Electroacoustic Transducer for Measuring Acoustical Impedances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tomas Salava 384

Sound Systems in Reverberant Rooms for Worship . . . . . . . David L. Klepper 391 Biradial and Spherical Stylus Performance in a Broadcast

Disc Reproducer . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . J. R. Sank 402

Hearing with Ears Instead of Instruments Paul C. Boomsliter and Warren Creel 407

Electronic MusicaI Tone Prod~iction by Nonlinear Waveshaping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Richard A. Schaefer 411

An Inertial Head-Contacting Audio Communications Headset System G. J. Sebesta. A. J . Mellen and R. W. Carlisle 418

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Design of a Tone Generator Stanley Kelly 424

A High-Performance Control Console with Flexibilitj- . . . . . . Allan P. Smith 430

Ren~iniscences: I. Soise: 11. Sound Stages . . . . . . . . . . . . . . . . Vern 0. Knudsen 436

LETTERS TO THE EDITOR Comments on .'A Plea for Accurate Terminology"

. . . . . . . . . . . . . . (Melvin C. Sprinkle, JAES 18, 3 (1970)) John G. McKnight 440

Comn~ents on "Perceptibility of Wow and Flutter" (Hisan Sakai, JAES 18, 3 (1970)) . . . . . . . . . . . . . . . . . . . . John G. McKnight 440 Comments on "A Differential Telephone Repeater Circuit'' (Joseph H. Dessen. JAES 17, 5 (1969)) . . . . . . . . . . . . . . . . . . . . . Henry Korkes 441 Audio Therapy for Hospitalized Engineers and Musicians . . . J. Robert Ashle! 41.2

Rrnadhand Network Circrrits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Robert Orban 441 Further Thoughts on "A Rational Technique for Synthesizing Pseodo-Stereo from Monophonic Sources" (Robert Orban, JAES 18; 2 (197011 . . . . . . . . . . . . . . . . . . . . . . . . Robert Orban 443

DEPARTMENTS

. . . . Sound Track . . . . . . . . . . . . . . . , . 446 Shopping the Audio Marker 46s . . . . . . . . . . . News of the Sections . . . . . . . . . . 450 Available Literature 4'74

. . . . . . . . . . Revieh of Acoustical Patents 454 Membership Information 38:

D. M. Black R. C. Heyser D. S. i\.ZcCoy A. P. G. Peterson J. D. Colvin J. M. Hollywood J. G. McKnight H. E. Roys n. H. Cooper P. Kantrowitz D. W. Martin M. R. Schroeder J. M. Eargle E. E. Kent R. A. Moog 6. F. Swisher E. J. Foster D. L. Klepper A. R. Morgan E. L. Torick M. B. Gardner J. H. Kogen J. T. Mullin D. R. von Recklinghausen J. R. Harris K. Kramer R. E. Owen J. G. Woodward



Journal of the Audio Engineering Society. Volume 18, No. 4. August 1970. Published bi-monthly by t he Audio Engineering Society and supplied t o al l members i n good standing. Publication office, 104 Libertv Street. U t~ca . N.Y. 13502. Execut~ve office. Room 428. L ~ n c o l n Bul lding. 60 East 42nd Street, ~ e k York, 'N.Y. 10017. Entered as second class mai l a t the post office a t ct ica, N.Y. Sub- scr ipt ion t o nonmembers, $22.50 per year. Copyright 1969 by t he Audio Engineering Society. The Journal IS indexed In t he Appl ied Science & Technology Index. The Journal of the Audio Engineering Society hereby grants permission t o repr int i n par t , any Daoer i n th is issue i f direct oermission i s obtained f r o m i ts author(s) and credit is given t o t he author(s) and t h ~ s journal. An author, or hls research affl l late may reproduce h ~ s faper In fu l l c r e d ~ t ~ n g th ls journal T h ~ s permlsslon IS not assignable The "Journal o f the Audio Engineering Society" and ~ t s cover d e s ~ g n has been registered as 2 t rademark ~n the U n ~ t e d States Patent Offlce ST

OFFICERS 1969-70 Frederick V. Hunt President George \V. Bartlett Executive Vice-President Harry A. Pearson Eastern Vice-President James H. Kogen Central Vicc-President Hugh S. Allen, Jr. Western Vice-President Donald J. Pl~inkett Secretary John J. Bubbers Treasurer

BOARD OF GOVERNORS Benjamin B. Barier Leo L. Reranek Duane H. Cooper Donald B. Davis Robert 0. Fehr Keith 0. Johnson Robert E. Owen Daniel R. von Recklinghausen S. Allen Selby IXI Philip B. Williams

COMMITTEE CHAIRMEN R. E. Owen Admissions L. L. Beranek Awards H. A. Pearson 39th Convention H. S. i211cn, Jr. 38th Convention G. W. Bartlett Convention Policy F. V. Hunt Executive Committee J. Harvey Exhibits J. J. Bubbers Finance J. D. Colvin Historical G. W. Bartlett Laws & Resolutions W. H. Freitag Library S. A. Selby I11 blembelshlp B. B. Uauer Nominat~ons G. W. Bartlett Publications Policy D. W. Powers Sections H. E. Rojs Standards D. B. Davis Sustaining Memberships W, H. Freitag 1 ellers

SECTIONS Canada * Japan 9 Los Angeles Midwest New York * San Francisco . Washington

ADMINISTRATION Dorothy H. Spronck Adn~inistrat~ve Secretary

SOCIETY COMMUNICATIONS Manuscripts. editorial and advertising correspondence should be sent to Editorial Offices, Audic Engineering Society Journal, 124 East 40th Street, New York 10016. Address all other Society business to the Audio Engineering Society, Room 428, Lincoln Building, 60 East 42nd St., New York, N.Y. 10817, Mernber~hi~p information and back copies may be obtained from either office,

JOURNAL OF THE

AUDIO ENGINEERING SOCIETY VOLUME ? & NUMBER 5

ARTICLES

OCTOBER 1970

Extraction of Ambiance I~lforrnation from Ordinary Recordings E. Roeibaek Madsen

An Experiineiltal Stndy of Groove Defornlation in Phonograph Recorcis James V. White

An E~aluation of the Forces Reqoired to Rlove a Tone Arm John 5. Bubber5

.Miniature Electret Microphones F Frarni and P Mutphy Acoustic Impedance Calibrator for Mask and Microphone Measuren~euts

Charles T blorrow and Austln J Brouns Wisdom and Witchcraft of Old Wives' Tales About Woofer Baffles

J Robert Ashley and Thomas A Sapona? The Dyuarnic Range of Dtsc and Tape Records

Danlel W Gravereauu, Arthur J Gust, and Benjamln B Bauer The Sonde: A hew Approach to Rloltiple S i n e ~ a v e Generation

Hugh Le Came and Gustav Ciamaga Development of a New Magnetic Tape for hlr~sic Mastering Delos A E~le l s

PROJECT NOTES

. . . . . . . . . . . . . . . . . . . . . . . . . . On Designs and Applications Pail-ick Gleeson A Note on Determining Optimr~m Enclosure Volume for a Low- Frequency

Loudspeaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AlbertW.Cobb Additional Comments on Optimum 1-olurne Vented Box Baffles

I. Robert Asblev

f l b

52;


Further Comments on "A Plea for Accurate Terminology" A. P. Evans: Albert R. Rienstra; Roger K, Odorn; Nol.man H. C~.owhurst 551-56

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 011e Convention Per Year? W. L. Cara 556 The Society Replies

. . . . . . . . . . . . . . . . . . . . (W. L. Cara. JAES 18. 5 (1970) I Frederick V. Hunt 556

DEPARTMENTS

Exhibits Preview . . . . . . . . . . . . 558 Sound TI-ack . . . . . . . . . . . . . . . . 5'9: Review of Acoustical Patents . . . 576 Available Literature . . . . . . . . . . 546 Shopping the Audio Market . . . . X R Membership Information . . . . . . 606

Editorial . . . . . . . . . . . . . . . . . . . . 615

EDITORIAL BOARD

I). M. Black R. C. Heyser D. S. i\lcCoy A. P. G. Peterson J . D. Colvin J. M. Hollywood J. G . McKnight H. E. Rogs D. H. Cooper P. Kantrowitz D. W. Martin M. R. Schroeder J. M. Eargle E. L, Kent R. A. Moog @. F. Swisher E. J. Foster D. L. KIepper A. R. Morgan E. L. Torick M. B. Gardner J. H. Kogen J. T. klullin D. R. von Recklinghansen J. R. Harris K. Kramer R. E. Owen J. G. Woodward

Robert 0. Fehr Editor Jacqueline Harvey Managing Editor Evelyn A. Morris Production Editor Ingeborg M. Stoch~nal Copy Ed~tor


Journal of t he Audio Engineering Society. Volume 18, No. 5, October 1970, Published bi-monthljr by t he Audio Engineering Society and supplied t o all members i n good s tand~ng. Pub l ica t~on office, 104 Liberty Street Utica N.Y. 13502. Execut~ve off~ce, Room 428, Lincoln Bui lding 60 East 42nd Street, New York, 'N.Y. lb017. Entered as second~class mai l a t the post offic? a t ~ { i c a , N.Y. Sub- scription t o nonmembers, $22.50 per year. Copyright 1970 by t he Audio E n g ~ n e e r ~ n g Soclety. The Journal is indexed i n the Applied Science & Technology Index. The Journal of the Audio Engineering Society hereby grants permission t o repr int i n part, any paper i n th is i s s u e i f direct permission is obtalned from i ts author(s) and credit is glven to t he author(s) and th is journal. An author, or his research affi l iate may reproduce h is paper in fu l l credit ing th is journal. This permission is not assignable. The "Journal of the.Audio Engineering Society" and ~ t s cover design has been registered as a t rademark In the U n ~ t e d States Patent Office. -. ~

a%, , . . ~ X , c - -

OFFICERS 1970-71 George W. Bartlett President J. G. Woodward Executive Vice-President John M. Eargle Eastern Vice-President Peter W. Tappan Central Vice-President William P. Brandt Western Vice-President Donald J. Plunkett Secretary Arthur E. Gruber Treasurer

BOARD OF GOVERNORS Ben jamin B. Bauer Leo L. Beraneli R. T. Bozak Marvin Camras Duane H. Cooper Robert 0. Fehr Frederick V. Hunt S. Allen Selby 111 John E. Volkmann Phillip B. Williams

COMMITTEE CHAIRMEN D. H. Cooper Adn~issions B. B. Bauer Awards W. P. Brandt 40th Convention J. M. Eargle 4lst Convention J. G. Woodward Convention Policy F. V. Hunt Executive Committee 3. Harvey Exhibits A. E. Gruber Finance J. D. Colvin Historical J. G. Woodward Laws & Resolutions \Y. H. Freitag Library S. A. Selby l II Membership F. V. Hunt Nominations R. 0. Fehr Publications Policy H. 0. Kaitchuck Sections 3. G. McKnight Standards P. B. Williams Sustaining Memberships M. H. Freitag Tellers

SECTIONS British Canada . Central Europe . Japan . Los Angeles

Midwest New York San Francisco - Washington


/ SOCIETY COMMUNICATIONS M:.luscripts, editorial and advertising correspondence should be sent to Editorial Offices, Audio Engineering Society Journal, 124 East 40th Street, New York 10016. Address all other Society business to the Audio Engineering Society, Room 428. Lincoln Building, 60 East 42nd St., New York, N.Y. 10017, Membership information and back copies may be obtained from either office.

JOURNAL OF THE

AUDIO ENGINEERING SOCIETY VOLUME 18 NUMBER 6 DECEMBER 1970

ARTICLES A Mechanical Disc Recording and Reproducing System With High Storage

Density and High Rate of Information Transmission Gerhard Dickopp, Hans-Joachim Klemp, Horst Redlich and Eduard Schueller 61s

;\lultiplex Methods for F M Broadcast Transmission of Four-Channel Stereo Signals . . . . . . . . . . . . . . . . . . . . . William S. Halstead and Leonard Feldman 624

A Wideband Miniature Microphone . . Mead C. Killion and Elmer V. Carlson 631 Third-Order Gradient Microphone for Speech Reception

B. R. Beavers and R. Brown 636 Calc~ilation of the Stray Reluctance of Gaps in Magnetic Circuits

Egon Unger and Klaus Fritzsch 641 Choosing a Formula for Calculating the Absorption Coefficient from

Reverberation Chamber Measurements . . . . . . . . . . . . . . . . . John G. Powell 644 Magnetic Recording Standards and Signal-to-Noise Ratio

Hanswerner Pieplow 648 Subjective or Psopllon~etric Audio Noise Measurement: A Review of Standards

H. A. 0. Wilms 651 Electronic Adjustment of Monitoring Acoustics . . . . . . . Daniel N. Flickinger 65" Aco~istical Treatment and Sound Reinforcing System for Washington State

Legislat~ire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Herbert T. Cbaudiere 662 Design Innovations In a Portable Sound Reinforcement System

Stephen Desper and R. L. Bennett 667

PROJECT NOTES I ENGINEERING BRIEFS Electronic Music in Every Home . . . . . . . . . . . . . . . . . . . . . . Winston E. Kock 671 Unbaffled Loudspeaker Column Arrays . . . . . . . . . . . . . . . . . John K. Hilliard 672

LETTERS TO THE EDITOR A Scientific Explanation of Phasing . . . . . . . . . . . . . . . . . . . . . . . Bruce Bartlett 674 Derivation of Harmonic Eqnations in Nonlinear Circuits . . . . . . . C. Y. Sr~en 675 Comments on "Subjective or Psophometric Audio Noise Measurement: A Re-

view of Standards" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A. Douglas Smith 67' (Herman A. 0. Wilms, JAES 18, 6 (1970))

Further Thonghts on Accurate Terminology . . . . . . . . . . . . . Michael McLean 67- (Melvin C. Sprinkle. JAES 18, 3 (1970'))

DEPARTMENTS 39th Convention . . . . . . . . . . . . . 678 Available Literature . . . . . . . . . . 72i Complete Convention Program . 688 Shopping the Audio Market . . . . 723

. . . . . . . . . . . . . . . . . . . Review of Acoustical Patents . . . 708 Standards 726 News of the Sections . . . . . . . . . . 718 Membership Inforn~ation . . . . . . 727 Sound Track . . . . . . . . . . . . . . . . . 720 Obituaries . . . . . . . . . . . . . . , . . . . 73C

Index to Volume 18 . . . . . . . . . . 731

EBlTORlAL BOARD J. R. Ashley R. C. Heyser D. S. McCoy A. P. G. Peterson D. M. Black J. M. Hollywood J. G. McKnight .M. R. Schroeder D. H. Cooper P. Kantrowitz R. A. Moog C. P. Swisher 3. M. Eargle E. L. Kent A. R. Morgan E. L. Torick E. 3. Foster D. L. Mlepper J. T. Mullin D. R. von Recklilaghausen M. B. Gardner 3. H. Kogen R. E. Owen J. G. Woodward

Robert 0. Fehr Editor Jacqueline Harvey Managing Editor Evelyn A. Morris Production Editor Hngeborg M. Stochmal Copy Editor


Journal of t he Audio Engineering Society. Volume 18, No. 6, December 1970. Published bi-monthly by the Audio Engineering Society and supplied to all members i ngood standing. Publication office, 104 Liberty Street, Utica, N.Y. 13502. Executive office, Room 428, Lincoln Building, 60 East 42nd Street, New York, N.Y. 10017. Entered as second class mai l at the post office a t Utica, N.Y. Sub- scr ipt ion t o nonmembers, $22.50 per year. Copyright 1970 by the Audio Engineering Society. The Journal is indexed i n the Applied Science &Technology Index. The Journal of the Audio Engineering Society hereby grants permission t o repr int i n part, any paper i n this issue if direct permission I S obtained f rom i ts author(s) and credit i s g iven t o t he author(s) and this journal. An author, or h is research affi l iate may reproduce h is paper i n f u l l credit ing th is journal. This permission is no t assignable. The "Journal of the Audio Engineering Society" and i ts cover design has been registered as a t rademark i n the United States Patent Office.

mnTiZYL r?z-rh ._

OFFICERS 1970-71 George W. Bartlett President d. 6. Wondward hxecutive Vi~c-Prcsideilt John M. Earglc Eastern Vice-president Peter W. Tappan Central Vice-President \l illiarn 1'. Brandt Western Vlcc-Prcs~ctent Donald J. Plunkett Secretary Arthur E. G n ~ h e r Treasurer

BOARD OF GOVERNORS Benjamin B. Bauer Lea K,. Beranek It. T.. Uozak hlarrin Camras Duane B. Cooper Rohert 0. Fehr Frederick V. Hunt S. Allen Selby 111 John E. \ ' o lh~ann Phillip U. Williams

COMMITTEE CHAIRMEN D. R. Cooper Adn~~ssionz B. U. lPauer Awards \Y. P. Bmndt 40th Convent~on J. M. Eargle 41st Convent~on J. G. Woodnrzrrd Convcnt~on Policy d:. W. Bartlett Fxecutlvc Comm~ttee J. Harvey Evhilrits A. E. Grnber Finance J. D. Culvin H ~ s t o ~ lc,~! J. G. Woodward Law\ & liesolutions 'VI.. W. Freitag Lib1 a1 v S. A. Selby I l l Meniherbhip Y. W . Hunt h om~natlons R. 0. Fehr Publ~cationj Policy H. 0. Kaitchnck Sections 1. G. McKnigl~t Standards P. B. Williams Subta~nlnp Memhrr5hips n . H. Freitag 1 ellei s

SECTEONS British - Canada . Central E~rrope . Japan - Ims Angeles

ZTidwest - New York - S ~ I Y Francisco Washington


SOCIETY COMMUNICATIONS Manuscripts, editorial and advertising correspondence should be sent to Editorial Offices, Audio Engineering Society Journal, 124 East 40th Street, New York 10016. Address a11 other Society business to the Audio Engineeling Society, Room 428, Lincoln Building, 60 East 42nd St., New York, N.Y. 10017. Membership information and back coples may be obtained from either office.

AUDIO ENGINEERING SOGIETY VOLUME 19 NUMBER 1 JANUARY 1971

ARTICLES . . . . . . . . . . . . . . . 'The Sirnulation of Moving Sound Sources John M. Chowning '2

Operational Arnplitier lmplert~e~~tiation of Ideal Electro~~ic Crossover Networks J. Kobert Ashley and Lawrence M. Henne 7

. . . . . . . . . . . . . . Constant-Voltage Crossover Network Design Kichard H. Small 12

. . . . . . . . . . . . . . . . Ultrasound in Retinal Detachment Surgery David B. Karlin 20

. . . . . . . . . . Musicassette Quadrasonic: Tape Record Cou~patihility E. K. Hailson 2 4

Audio in Medicine: The Electronics of 1Verrons Trarlsniissior~ . . Marvin 11). Weiss 2; . . . Discrete Field Equalization for Sound Reinforcement Systems Daniel Queen 33

Sound Colomns--Practical Design and Applications L. H. Schaudinischky, A. Schwartz and S. T. Mashiah 30

Experirncntal Wide-Randwidth Tooth-Contact Microphone ... Austin J. Rrouns 41

Clc~sing the Wireless Versus Wired Microphone Dependability Cap Barry M. Knufman 46

PROJECT NOTES I ENGINEERING BRIEFS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 'The Moog at the Guggenheim David L. Klepper 52

A Note on lCJsing Resonance Frequencies in a Test Box and in Free Air to . . . . . . . . . . . . Measure Speaker-to-Eoclosure Con~pliance Ratio Albert W. Cobb 5 3

Comments on "Kesonance Preyne~~cics to Me:~sure Speaker-to-Enclosure Coo~pliance Ratio"

. . . . . . . . . . . . . . . . . . . . . (Alberl W. C'obb. SAES 19, 1 (1971)) J. Kobert Ashley 5'

Crossover Networks and Mcrdulation Distortion (Paul W. Klipsch, JAES 17. 2 (1969)) . . . . . . . . . . . . . . . . . . . . . Richard H. Small 55 Phase and 1)elay Distortion in Mnltiple-Driver 1,oudspeaker Systems ( J . Robert Ashley and Lawrence M. Henne. JAES 19, 1 (1971)) . Richard 1-1. Small 56

LETTERS TO THE EDITOR Colnments on "Wisdo~n and Witchcraft"

IJ Robert Ashley a ~ l d T A sap on,^, J A t S 18, 5 (1970)) . Wair~zr Clcolentj i?

Reply to "Comments on 'Wisdom and Witchcraft'" . . J Robert Ashlev 7 8

DEPARTMENTS Review of ACOLIS~~L.:I~ Patcnts . . . . . 60 SOLIIILI Track . . . . . . . . . . . . . . . . . . . 7s Stancli~rds . . . . . . . . . . . . . . . . . . . . . 68 Available 1.iter.alurc . . . . . . . . . . . . . 80 Haddy Add]-euse\ the 70th . . . . . . . 70 Shopping the Audio Market . . . . . . 81 Editorial . . . . . . . . . . . . . . . . . . . . . . 74 Membership Information . . . . . . . . 86 News of the Sections . . . . . . . . . . . . 76 Obituaries . . . . . . . . . . . . . . . . . . . . . 92

EDITORIAL BOARD I. K. Alhlcy R. C. Heyscr U. S. McCoy A. ID. G. Peterson D. M. Black J. M. Hollywood 3. G. R/(cKnigM hf. R. Schroeder 1). H. Cooper 1'. Kautrowitz K. A. Moog C. F. Swisher a. M. llargle E. I,. Kent A. R. l\.lorgan E. I,. Torick E. i. Foster r). L. Klepper I. T. Mnllin D. R. von Recklinqhausen M. R. Gardner I. H. Kogen K. E. Owen J. G. Woodward

Robert 0. Fehr Editor Jacqueline Harvey Managing Edltor Evelyn A. Morris Production Editor lngeborg M. Stochmal Copy Fditor

Harry F. Olson Ed~tor Emeritus

Journal of the Audio Engineering Society. Volume 19. No. 1, January 1971. Published month ly big the Audio Engineering Society and supplied t o all members In good standing. Publication office. 104 L~be r t y Street, U t ~ c a , N.Y. 13502. Execut~ve office, Room 428, Lincoln Bullding, 60 East 42nd Street, New York. N.Y. 10017. Entered as second class ma i l a t the post o f f~ce a t Utica. N.Y. Sub- scr lpt lon to nonmembers. 530.00 per year. Copyright 1971 by t he Audio Engineering Society. The Journal is indexed i n the Applied Science &Technology Index. The Journal of t he Audio Engineering Society hereby grants permission t o repr int In par l , an> paper i n this Issue ~f direct permission is obtained frorn ~ t s author(s) and credit i s glven t o the author(s1 and this journal. An author, o r his research affi l iate may reproduce h is paper i n ful i credit ing t h ~ s journal. This permission IS not ass~gnable. The "Journal of t he Audio Engineering Society" and i ts cover design has been registered as a trademark i n t he United States Patent Office. '+-.-+

n.@r.,=M,rl Ac.,,x,.


BOARD OF GOVERNORS Benjamin B. Bauer Leo L. Beranek R. T. Bozak Marvin Camras Duane H. Cooper Robert O. Fehr Frederick V. Hunt S. Allen BeXby 111 John E. Volkmann PhilIip B. Williams

COMMITTEE CHAIRMEN D. )I. Cooper Admissions B. B. Bauer Awards W. P. Brandt 40th Convention J. Me Eargle 41st Convei~tion J. G. Woodward Convention Policy G. W. Bartlett Executive Committee J. Harvey Exhibits A. E. Gruber Finance J. D. Colvin Hisrorical J. G. Woodward Laws & Resolutions W. H. Freitag Library S. A. Selby III Membership F- V, Hunt Nominations R. 0. Fehr Publications Policy H. 0. Kaitchuck Sections 3. G. McKnight Standards P. 1. Williams Sustaining Memberships W. H. Freihg Tellers

SECTIONS British - Canada Central Europe - Japan - Los Angeles

Midwest . New York San Francisco Washington


SOCIETY COMMUNICATIONS Manuscripts, editorial and advertising correspondence should be sent to Editorial Offices, Audio Engineering Society Journal, 124 East 40th Street, New York 10016. Address all other Society business to the Audio Engineering Society, Room 428, Lincoln Building, 60 East 42nd St., New York, N.Y. 10017, Membershig information and back copies may be obtained from either office.

/ dOURNAL 8 F THE

AUDIO ENGINEERIN6 SOCIETY VOLUME 19 NUMBER 2 FEBRUARY 1971

ARTICLES . . . . . . . . . . . . . . . . . A Linear Theory of Phonograph Playback James V. White 94

Impulse Measurement Techniques for Quality Determination in Hi-Pi . . . . Equipment, with Special Emphasis on Loudspeakers Aifred Schaumberger 101

Development and Applicatioil of a New Tracing Simulator . . Dieter Braschoss 108

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . A Dynamic Noise Filter Richard S. Burwen 3 15

Development of An lntracranial Pressure Transducer . . . . . . Lauchlan McKay 121

. . . . . . . . . . . . . . . Simplified Educational Music Synthesizer Ralph W. Burhans 122

Microphone Accessory Shock &lount for Stand or Boom Use . . Gerald W. Piice 133

PROdECT NOTES I ENGINEERING BRIEFS Problems of Sound Reillforcement in Large Halls . C. P. Boner and C. R. Boner 138

Design and Construction of a Stereophonic Amplifier-Loudspeaker Switching; Routing Facility for Use at the Conventions of the Audio Engineering Society

Thomas R. Haskett 140

Encephalophone: An Electronic Stetl~oscope for the Brain H o ~ a c e T. Castillo and Ira Sherwin 142

LETTERS TO THE EDITOR Comments on "Biradial a i d Spherical Stylus Performance in a Broadcast Disc Reproducern

. . . . . . . . . . . . . . . . . . . . . . . . . . . (J. R. Sank. JAES 18, 4 (1970)) D. A. Barlow 145

Reply to "Comments on 'Biradial and Spherical Stylus Performance in a . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Broadcast Disc Reproducer"' 1. R. Sank 146

DEPARTMENTS Review of Acoustical Patents . . 149 Shopping the Audio Market . . . . . 170

Standards . . . . . . . . . . . . . . . . . . . . 160 Available 1,iterature . . . . . . . . . . . . 173

News of the Sections . . . . . . . . . . . 166 Membership lnformalion . . . . . . . 176

Sound Track . . . . . . . . . . . . . . . . . . 168 Obituaries . . . . . . . . . . . . . . . . . . . . 180

EDITORIAL BOARD J. R. Ashley R. C. Heyser D. S. McCoy A. P. G. Peterson D. M. Black J. M. Hollywood J. G. McKnight M. R. Schroeder D. H. Cooper P. Kantrowitz R. A. Moog C. F. Swisher J. M. Eargle E. E. Kent A. R. Morgan E. L. Torick E. J. Foster D. L. Klepper 3. T. Mullill D. R. von Reeklinghausen M. B. Gaadner J. H. Kogen R. E. Owen J. G. Woodward

Robert 0. Fehr Editor Jacqueline Harvey Managing Editor Evelyn A. Morris Production Editor Ingeborg M. Stochmal Copy Editor


Journal of the Audio Engineering Society. Volume 19, No. 2 February 1971. Published monthly by the Audio Engineering Society and supplied to all members'in good standing. Publication off~ce, 104 Liberty Street Utica N.Y. 13502. Executive office Room 428 Lincoln Building 60 East 42nd Street, New ~ o r k , ' ~ . ~ . 10017. Entered as second clas; mail at tke post office at ~ k i c a , N.Y. Sub- scription to nonmembers, $30.00 per year. Copyright 1971 by the Audio Engineering Society. The Journal is indexed in the Applied Science &Technology Index. The Journal of the Aud~o Engineering Society hereby grants permission to reprint i n part, any paper in this issue i f direct permission is obtained from its author(s) and credit is given to the author(s) and this iournal. An author. or his research affil iate mav rewroduce his oacrer i n ful l * . " . crediting this journsl. This permiss~on is not assignable. The "Journal of the Audio Engineering Society" and i ts cover design has been registered as a trademark in the United States Patent Office.

u-*o p --

OFFICERS 1978-71 George W. Bartlett President J. G. Woodward Executive Vice-President John M. Eargle Eastern Vice-President Peter W. Tappan Central Vice-President William P. Brandt Western Vice-president Donald J. Plunkett Secretary Arthur F,. Gruber Treasurer

BOARD OF GOVERNORS Benjamin B. Baraer Leo L. Bermek R. T. Ilozak Marvin Camras Duane M. Cooper Robert 0. Febr Frederick V. Hun% S. Ailen Selby ILI John E. Volkmann Phillip B. FTilliams

COMMITTEE CHAIRMEN D. H. Cooper Admissions B. B. Bauer Awards W. P, Brandt 40th Convention J. M. Eargle 4 1st Convention J. G. Woodvard Convention Policy G. W. Bartlett Exeiu~ive Committee J. H m e y Exhibits A. E. G n ~ b e r Finance J. D. Colvin Hisrorical J. G. Wooduard Laws & Resolutions W. H. Freitag Library S. A. Selby 111 Membership F. V. Hunt homifiations R. 0. Fehr Publications Policy H. 8. Kiitchuck Sections J. 6. McKuight Standards P. B. Williamc Sustaining Mernberships W. H. Freitag Teilers

SECTIONS British Canada - Central Europe = Japan . Los Aagelee = Midwest New York . San Francisco . Washington

ADMINISTRATION Dorothy H. Spronck Administrdiva Secmtaq

SOCIETY COMMUNICATIONS Mannscripts. editorial and advertising correspondence should be sent to Editorial Osces, Audio Engineering Society Journal, 124 East 40th Street. New York 10016. Address all other Society business to the Audio Engineering Societ?. Room 929. Lincoln Buildmg 60 East 42nd St., New York, N.Y. 10017, Membership ~nfoxmation and back copies may be obtained from either office. ---;&a

AUDIO ENGINEERING SOCIETY VOLUME 19 NUMBER 3 MARCH 1371

Stetl~oscope Acoustics and the Engineer: Concepts and Problems Paul Y. Ertel, Merle La~rence. and Wonjin Song 182

Active-Network Realizatiol~ of a 97-Channel Audio Filter Bank Victor W. Rohe. Harold I. Fristoe. and James E. Baker I84

. . . . . . . . . Wasking Noise Sjstems in Open and Closed Spaces Ranger Farre11 1 g7

The EfFect of Sound on Plant Growth . . . . . . . . . . . . . . . . . . . . Paul E. Newton 202

Some Design Coilsideratioi~s for Electrostatic Headphones . . . John J. Bubbers 206

Srnall Balanced Armature Receiver for Electronic Telephone Sets Henning S. Madsen 209

A Three-Way C o l u n ~ ~ ~ a r Loudspeaker for Reinforcement of the Performing Arts Allan P. Smith 213

PROJECT NOTES I ENGINEERING BRIEFS Anti-High Futility for an Air-conditioned Pickup Tmck . . . . J Robert Ashley 220

Selected Ahstractq from Coliference of the New York Academy of Sciences on 4dvances in Magnetic Recording . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221


. . . . . . . . . . . . . . . . . . . 'Votes on Pickup Design and Response D. A. Harlov- 222

DEPARTMENTS Review of Acoustical Patents . . . . 229 Sound Track . . . . . . . . . . . . . . . . . . 248

Standards . . . . . . . . . . . . . . . . . . . . 240 Available Literature . . . . . . . . . . . . 250

. . . . . . . . . . . . . . . . . . . . . . . . . . Editorial 244 Shopping the Audio Market 253

. . . . . . . News of the Sections . . . . . . . . . . . 236 Membership information 236

. . . . . . . . . . . . . . . . . . . Obituaries 260

EBlTORIAh BOARD %. R. Ashley R. C. Heyser D. S. McCoy A. P. G. Peterson D. M. Black J. M. Hollywood J, G, RlcKnight 5l.R Schroeder D. H. Cooper P. Kantrowitz R. A. Moog C. F. Swisher %. M. Eargle E. L. Kent A. R. Morgan E. L. Torick E. J. Foster D. L. Klepper J. T. Mullin I?. W. von Recklinghar~sea M. B. Gardner J. 8. Kogen R. E. Owen J. G. Woodward



Journal of the Audio Engineering Society. Volume 19. No. 3 March 1971. Published monthly by the Audlo Engineering Society and supplied t o all members 'in good standing. Publication office. 104 Liberty Street Utlca. N.Y. 13502. Executive office Room 428 Lincoln Bul lding. 60 East 42nd Street New Yorlc 'N.Y. 10017. Entered as second clas; mai l at th'e post office a t Utica, N.Y. Sub- scr ipt ibn t o nonmembers. $30.CO per year. Copyright 1971 by t he Audio Engineering Soclety. The Journal IS indexed i n the Applied Science &Technology Index. The Journal of the Audio Eng ineer~ng Society hereby grants permission t o repr i r ' in part, an!> paper i n th is issue i f direct pernlission i s obtained f r om ~ t s author(s) and credit 13 given to the author(s) and this journal. An author, o r his research affi l iate may reproduce h is paper i n f u l l credit ing this journal. This permiss~on is not assignable. The "Journal of the Audio Engineering Society" and ~ t s cover design has been registered as a trademark in t he United States Patent Office.

OFFICERS 1970-91 George W. Bartledt President J. G. Woodward Executive Vice-President J o h M. Eargle Eastern Vice-President Peter W. Tappan Central Vice-President William P. Brandt Western Vice-President Donald J. Plunkett Secretary Arthur E. Gruher Treasurer

BOARD OF GOVERNORS Benjamin B. Bauer Leo L. Bemnek R. T. B o d Marvin C m w s Duane M. Cooper Robert 0. Fehr Frederick V. Hunt S. Amen Selhy III John E. Volkmann Phillip B. Williams

COMMITTEE CHAIRMEN D. & Cooper Admissions B. B. Bauer Awards W. P. Brandt 40th Convention J. I\a. Eargle 41st Convention J. G. Woodward Convention Policy G. W. Bartlett Executive Committee J. A m y Exhibits A. E. Gruber Finance J. a. CoIvin Historical J. G. Woodward Laws & Resolutions W. H. Freitag Library S. A. Selby 111 Membership F. V. Hunt Nominations R. 8. Fehr Publications Policy M. 0, Kaitchuck Sections J. G. McKnight Standards P. B. Williams Sustaining Memberships W. W. Freitag Tellers

SECTIONS British - Canada * Central Europe - Japan . Los Angeles

Midwest . New York Sm Francisco - Washington


SOCIETY COMMUNICATIONS Manuscripts, editorial and advertising correspondence should be sent to Editorial Offices, Audio Engineering Society Journal, 124 East 40th Street, New York 10016. Address all other Society business to the Audio Engineering Society, Roon~ 929, Lincoln Building, 60 East 42nd St., New York, N.Y. 10017, Membership information and back copies may he obtained from e~ther office. +iize

AUDIO ENGlllEERlW G SOCIETY VOLUME 19 NUMBER 4 APRIL 1971

ARTICLES

On The Processing of Two- and Three-Channel Program Material For Four- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Channel Playback John M. Eargie 262

. . . . . . . . . . . . . . . . . . . . . . . Fnnr Channels and Cornpatibility Peter Scheiber 267

. . . . . . . . . . . Analysis of Crosstalk on Stereo Test Records Bernhard W. Jakobs 280

. . . . . . . . Signatnre Aoalgsis of Heart Sounds and Murmurs Benedict Kingsley 288

Plain and Fancy Test Sig~rals for Music Reproduction Systems Thomas A. Saponas, Randolph C. Matson, and J. Robert Ashley 294

Providing Foldhack with Ont-of-Phase Loudspeakers . . . . . . . Edward S. Jones 306

PROdECT NOTES 1 ENGINEERING BRIEFS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Attennation Pads Charles W. King 310


. . . . . . . . . Directional Ambiguity of Q~radruphonic Matrices Benjamin B. Bauer 315

. . . . Better Anlylifyit~g Prostheses for the Hearing Handicapped Anne Harrison 316

DEPARTMENTS

. . . . . . . . . . . . . . . . . . . . . Convention in Koln . . . . . . . . . . . . 320 Editorial 466

Complete Convention Program . . 328 News of the Sections . . . . . . . . . . . 370

. . . . . . . . . . . . . . . . . . Standards 338 S o ~ ~ n d Track 371 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Review of Acoustical Patents . . . . 341 Available Literature 373

. . . . . . . . . . . . . . . . . . . . . Exhibits Preview 354 Membership Information 376

EDITORIAL BOARD

J. R. Ashley R. C. Heyser D. S. McCoy A. P. 6. Peterson D. M. Black J. M. Hollywood J. G. McKnight M. R. Schroeder D. H. Cooper P. Kantrowitz R. A. Moog C. F. Swisher J. M. Eargle E. L. Kent A. R. Morgan E. L. Torick E. J. Foster D. L. Klepper J. T. Mullin D. R. von Reeklinghausen M. B. Gardner J. H. Kogen R. E. Owen J. G. Woodward

Robert 0. Fehx Editor Jacqueline Harvey Managing Editor Evelyn A. Morris Production Editor Ingehorg EM, Stochmal Copy Editor


Journal of the Audio Engineering Society. Volume 19. No. 4, April 1971. Published monthly by the Audio Engineering Society and supplied t o all members in good standing. Publication office. 104 Liberty Street, Utica, N.Y. 13502. Executive office, Room 428 Lincoln Bullding, 60 East 42nd Street New York N.Y. 10017. Entered as second class mail a t thk post office at Utica. N.Y. Sub. scriptibn to non&embers, $30.00 per year. Copyright 1971 by the Audio Engineering Society. The Journal is indexed in the Applied Science &Technology Index. The Journal of the Aud~o Eng~neering Society hereby grants permission to reprint i n part, any paper in this issue if direct permission IS obtained from its author(s) and credit.is given to the author(s) and this journal. An author, or his research affiliate may reproduce h ~ s paper In ful l crediting this journal. This perrnisslon is not assignable. The "Journal of the Audio Engineer~ng Soc~ety" and ~ t s cover design has been registered as a trademark in the United States Patent Office.

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OFFICERS 1970-71 George W. Bartlett President J. G. Woodward Executive Vice-President John M. Eargle Eastern Vice-President Peter W. Tappan Central Vice-President William P. Brandt Western Vice-President Donald J. Plunkett Secretary Arthur E. Gruher Treasurer

BOARD OF GOVERNORS Benjamin B. Bauer Leo L. Beranek R. T. Bozak Marvin Camras Duane H. Cooper Robert 0. Fehr Frederick V. Hunt S. Allen Selby 111 John E. Volkmann Phillip B. Williams

COMMITTEE CHAIRMEN D. H. Cooper Admissions B. B. Bauer Awards W. P. Brandt 40th Convention J. M. Eargle 41st Convention J. G. Woodwarcl Convention Policy G. W. Bartlett Executive Committee J. Harvey Exhibits A. E. Grnber Finance J. D. Colvin Historical J. G. Woodward Laws & Resolutions W. H. Freitag Library S. A. Selby 111 Membership F. V. Hunt Nominations R. 0. Fehr Publications Policy H. 0. Kaitchuck Sections J. G. McKnight Standards P. B. Williams Sustaining Memberships W. H. Freitag Tellers

SECTIONS British . Canada Central Europe . Japan Los Angeles - Midwest . New York San Francisco . Washington


f JOURNAL OF THE

I I VOLUME 19 NUMBER 6 JUNE 1971

I ARTICLES

Synthesizing Musical Sounds by Solviilg the Wave Equation for Vibrating Objects: Part I . . . . . . . . . . . . . . . . . . . . . . . . Lejaren Hi'iler and Pierre Ruiz 462

Loudspeakers in Vented Boxes: Part I1 . . . . . . . . . . . . . . . . . . . . . . A. N. Thiele 471 Compositional Limitations of Electronic Music Synthesizers

Hubert S. Howe. Jr. 484 A New Underwater Earphone . . . Louis A. Abbagnal-o and Benjamin B. Rauer 489 Active and Passive Filters as Londspeaker Crossover Networks

J. Robert Ashley and Allan L. Kaminsky 494 . . . . . . . . . . . A Sound System for Amphibious Assault Training Allan P. Smith 503

PROJECT NOTES I ENGINEERING BRIEFS

Electrical Versus Acousticai Parameters in the Design of Loudspeaker Crossover Networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G. L. Augspurgcr 509


Decibel, A Unit of Level . . . . . . . . . . . . . . . . . . . . . . . . . Robert W. Young 512 Postscript to "Loudspeakers in Vented Boxes" (A. N . Thiele, JAES 19, 5, 6 (1971 1) . . . . . . . . . . . . . . . . . . . . . . . . . . J. R. Ashley 516

DEPARTMENTS

. . . . ... Review of Acoustical Patents 518 Shopping the Audio Market 5 3 2

. . . . . . . . . . . Standards . . . . . . . . . . . . . . . . . . 524 Available Literature 534

. . . . . . . . . . . . . . . . . . News of the Sections . . . . . . . . . 526 Obituaries 536

. . . . . . SoundTrack . . . . . . . . . . . . . . . . . . 530 Men-ibership Information 538

EDITORIAL BOARD

3. R. Ashley R. C. Heyser D. S. McCoy A. P. G. Peterson D. M. Black J. M. Hollywood 3. G. McKnight M. R. Schroedea D. H. Cooper P. Kantrowitz R. A. Moog C. F. Swisher

J. M. Eargle E. L. Kent A. R. Morgan E. L. Torick E. .I. Foster D. L. Klepper 3. T. Mullin D. R. von Recklinghausen M. B. Garduer J. H. Kogen R. E. Owen 3. G. Woodward

Robert 0. Fehr Editor Jacqueline Harvey Managing Editor Evelyn A. Morris Production Editor Ingeborg M. Stochmai Copy Editor


SOClETY COMMUNICATIONS Manuscripts, editorial and advertising correspondence should be sent to Journal of the Audio Engineering Soclety. Volume 19, No. 6. June 1971. Published monthly by

the Audio Engineering Society and supplied to all members in good standing. Publication office. Editorial Offices, Audio Engineering 104 Libertv Street. Utsca. N.Y. 13502. Executive office, Room 428. Lincoln Bullding. 60 East 42nd Society Journal, 124 East 40th street, s i r e s ~ e h York 'N.Y. 10017. Entered as second class mail at the post office at Utica, N.Y. Sub-

New York 10016. Address all other scription to nonAembers. $30.00 per year. Copyright 1971 by the Audio Engtneering Society. The Journal is indexed in the Applied Science & Technology Index.

Society business to the Audio Engineering The Journal of the Audio Eng~neerlng Society hereby grants permission to reprint In part. any Society, Room 929, Lincoln Building, paper i n this issue if direct permission is obtained from tts author(s) and credit is glven to the

60 East 42nd St.. New York, N.Y. 10017, author(s) and !his journal. An author, or his research affiliate may reproduce his paper i n fulf crediting this journal. This permission is not assignable.

Memhership information and hack copies The "Journal of the Audio Engineering Society" and tts cover design has been registered as a may be obtained from either office. trademark in the United States Patent Office.

OFFICERS 1970-71 George W. Bartlett President J. G. Woodward Executive Vice-President John M. Eargle Eastern Vice-President Peter W. Tappan Central Vice-President William P. Brandt Western Vice-President Donald J. Plunkett Secretary Arthur E. Gmber Treasurer

BOARD OF GOVERNORS Benjamin B. Bauer Leo L. Beranek R. T. Bozak Marvin Camras Duane H. Cooper Robert 0. Fehr Frederick V. Hunt S. Allen Selby 111 John E. Volkmann Phillip B. Williams

COMMITTEE CHAIRMEN D. H. Cooper Admissions B. B. Bauer Awards W. P. Brandt 40th Convention J. M. Eargle 41st Convention J. G. Woodward Convention Policy G. W. Bartlett Executive Committee J. Harvey Exhibits A. E. Gmber Finance J. D. Colvin Historical J. G. Woodward Laws & Resolutions W. H. Freitag Library S. A. Selby I11 Membership F. V. Hunt Nominations R. 0. Fehr Publications Policy H. 0. Kaitchuck Sections J. G. McKnight Standards P. B. Williams Sustaining Memberships W. H. Freitag Tellers

SECTIONS British Canada . Central Europe - Japan Los AngeIes - Midwest - New York San Francisco . Washington


SOCIETY COMMUNICATIONS Manuscripts, editorial and advertising correspondence should be sent to Editorial Offices, Audio Engineering Society Journal, 124 East 40th Street, New York 10016. Address all other Society business to the Audio Engineering Society, Room 929, Lincoln Building, 60 East 42nd St., New York, N.Y. 10017, Membership information and back copies may be obtained from either office.

J O U R N A L OF THE

AUDIO EIGIW EERING SOCIETY VOLUME 19 NUMBER 7 JULY/AUGUST 1971

ARTICLES

Synthesizing Musical Sounds by Solving the Ware Equation for Vibrating . . . . . . . . . . . . . . . . . . . . . . Objects: Part II Lejaren Himller and Pierre Ruiz 542

. . . . . . . . Multichannel Stereo Matrix Systems: An Overview John M. Eargle 552 Factors Affecting Individual and Group Levels in Verbal Commuuication

Mark B. Gardner 560 New Techniques for Electronic Organ Tone Generation Richard A. Schaefer 570 A Discrete Four-Channel Disc and Its Reproducing System (CD-4 System)

T. Inoue, N. Takahashi, and I. Owaki 576 Miniature Headband-Mounted Dynamic Microphone For Professional

...................................... Applications Alan R. Watson 584 A New Profile for L P Records . . . . . . . . . . . . . . . . . . . . . . . Warren Rex Isom 590

PROJECT NOTES I ENGINEERING BRIEFS

Two Portable Reproducing Consoles for Sound-Effect Operations John R. Gable. Jr. 594

DEPARTMENTS ................. Review of Acoustical Patents .... 598 Sound Track 620

Standards .................... 610 Shopping the Audio Market .... 626

........... News of the Sections ......... 615 Available Literature 629

. . . . . . . Membership Information 633

EDITORIAL BOARD

3. R. Ashley R. C. Heyser D. S. McCoy A. P. G. Peterson D. M. Black J. M. Hollywood J. G. McKnight M. R. Schroeder D. H. Cooper P. Kantrowitz R. A. Moog C. F. Swisher J. M. Eargle E. L. Kent A. R. Morgan E. L. Torick E. J. Foster D. L. Kiepper J. T. Mullin D. R. von Recklinghausen M. B. Gardner 3. H. Kogen R. E. Owen 3. G. Woodward



Journal of AudLo Engineering Society. Vol. 19, No. 7. July 1971. Published monthly except August by the Audio Engineering Society and supplied to al l members in good standing. Publication otrice. 104 Llberty Street, Utica. N.Y. 13502. Executive office, Room 929, Lincoln Building, 60 East 42nd Street. New York, N.Y. 10017. Entered as second class mail at the post office at Utica. N.Y. Sub- scr~ptlon to nonmembers. $30.00 per year. Copyright 1971 by the Audio Engineering Society. The Journal is indexed in the Applied Science &Technology index. The Journal of the Audio Engineering Society hereby grants permission to reprint In part, any paper in this issue -if direct permission is obta~ned from its author(s) and c red~ t IS given to the author(s) and this journal. An author, or his research affiliate may reproduce his paper in ful l crediting this journal. This pernlission is not assignable. The "Journal of the Audio Engineering Society" and i ts cover design has been registered as a trademark in the United States Patent Office.


BOARD OF GOVERNORS Benjamin B. Bauer Leo L. Beranek R. T. Bozak Marvin Camras Duane H. Cooper Robert 0. Fehr Frederick V. Hunt S. Allen Selby IS1 John E. Volkmann Phillip B. Williams

COMMITTEE CHAIRMEN D. H. Cooper Admissions B. B. Bauer Awards W. P. Brandt 40th Convention J. M. Eargle 41st Convention J. G. Woodward Convention Policy G. W. Bartlett Executive Committee J. Harvey Exhibits A. E. Gruber Finance 3. D. Colvin Historical J. G. Woodward Laws & Resolutions W. H. Freitag Library S. A. Selby 111 Membership F. V. Hunt Nominations R. 0. Fehr Publications Policy H. 0. Kaitchuck Sections J. G. McKnight Standards P. B. Williams Sustaining Memberships W. H. Freitag Tellers

SECTIONS British Canada Central Europe - Japan - Los Angeles

Midwest New York . San Francisco Washington

ADMlNlSTRATlON Dorothy H. Spronck Administrative Secretary

SOCIETY COMMUNICATIONS Manuscripts, editorial and advertising correspondence should be sent to Editorial Offices, Audio Engineering Society Journal, 124 East 40th Street, New York 10016. Address all other Soci&y business to the Audio Engineering Society, Room 929, Lincoln Building, 60 East 42nd St., New York, N.Y. 10017, MembershQ information and back copies may be obtained from either office.

J O U R N A L OF THE

AUDIO ERGINEERIHG SOGIETY VOLUME 19 NUMBER 8 SEPTEMBER 1971

ARTICLES

A Compatible Stereo-Quadraphonic (SQ) Record System Benjamin B. Bauer, Daniel W. Gravereaux, and Arthur J. Gust 638

Suggested Performance Requirements for Compatible Four-Channel Recordi~lg Peter Scheiber 647

On the Acotrstics of Multitrack Recording Studios . . . . . . . Michael Rettinge~ 651 The Transitivity of Loudness Level . . . . . . Sanford E. Gel ber and Paul Milnel 656

. . . . . . . . . . . . . . . . . . . . . . . . . . . . Digital Tone Synthesis Ralph W. Burhans 660 The Application of Impulse Measurement Techniques to the Detection of

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Linear Distortion Alfred Schaumberger 664 Transportable Sound Amplificatiou for Disney On Parade

Albert A. Huff and William E. Blanton 669 Electronic Crossover Networks aud Their Condributioi~ to Improved

. . . . . . . . . . . . . . . . . . . . . . . . 1,oodspeaker Transient Response Allan P. Smith 674


Comments on "A Three-Way Lorrdspeaker for the Reinforcement of the Performing Arts''

. . . . . . . . . . . . . . . . . . (Allan P. Smith, JAES 19, 4 (1971)) Melvm C. Spr~nkie 680 Reply to "Comments on 'A Three-Way Loudspeaker for the Reinforcemelit of the Performing Arts' "

........ . . . . . . . . . . (Melvin C. Sprinkle. JAES 19, 8 (1971)) Allan P. Smith 682

REPORTS

Stethoscope Acoustics: Current Iilvestigative aud Clinical Status . Paul Y. Ertel 683 3rd Conference on Magnetic Recording of the Hungarian Optical, Acoustical

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . and Film Technical Society: Part 11 690

DEPARTMENTS . . . . . . . . . . . . . . . . . Standards . . . . . . . . . . . . . . . . . . . . 690 Sound Track 722

Review of Acoustical Patents . . . 694 Available Literature . . . . . . . . . . . 724

Exhibits Previews . . . . . . . . . . . . . 706 Membership Info~mation . . . . . . . 726

EDITORIAL BOARD J. R. Ashley R. C. Heyser D. S. McCoy A. P. G. Peterson D. M. Black J. M. Hoilywood J. G. McKnight M. R. Schroeder D. H. Cooper P. Kantrowitz R. A. Moog C. F. Swisher J. M. EargIe E. L. Kent A. R. Morgan 33. L. Torick E. J. Foster D. L. Kiepper J. T. Mullin D. R. von Recklinghausen M. B. Gardner J. H. Kogen R. E. Owen J. G. Woodward



Journal of the Audio Engineering Society. Volume 19, NO. 8, September 1971. Published monthly by the Audio Engineering Society and supplied to all members in good standing. Publication office. 104 Liberty Street, Utica, N.Y. 13502. Executive office, Room 929, Lincoln Building, 60 East 42n3

Street. New York, N.Y. 10017. Entered as second class mail a t the post office a t Utica. N.Y. Sub. scription to nonmembers, $30.00 per year. Copyright 1971 by the Audio Engineering Society. The Journal is indexed in the Applied Science &Technology Index. The Journal of the Audro Engineering Society hereby grants permission to reprint in part, any paper in this issue if direct permission is obtained from its author(s) and credit is given to the author(s) and this journal. An author, or his research affiliate may reproduce his paper in fulk crediting this journal. This permission is not assignable. The "Journal of the Audio Engineering Society" and its cover design has been registered as a trademark in the United States Patent Office.

OFFICERS 1971-72 J. G. \%oodward Plewicnt Hugh S. Allen, Jr. Executibe Vice ISle>ident D o ~ ~ a l a \\ . Poners Fnstem \/ice-Pre41dent C. Roger Ander\on C enti a1 Vs~e-Pres~dent Lcon A. Wortnlan Wc\tern Vscc-P~esident Donald J, Ylunkett Secs etarv Arthur E. Gruber TI e,i5,~1 el

BOARD OF GQVERNORS George C%. Bartlett Renja~nin B. Bauer R. T. Bozak Jlartin Carnras Frederick J7. Hunt J. G. lllclinight .r. L. Ooms \5 illiam L, Robinson John E, Volkra~ann

COMMITTEE CHAIRMEN \.I. Canlras Adni15sson4 r. 1. Hunt AM ,lids

L. A, \Vortma~a 42nd Conventson I). \\. Powers 47rd Con\eiltiun H. b. Allen, Jr. Convention Pol~cy .I. G. \\oodvrard Fxecut l~e Commstte:. J. H a r ~ e j L-xhih115 4. E. Grober I-~n,ince J. D. Colvin H~ztor l i ,~) 1%. I.. Robinson Laws d 12esol~1tso11~ \\ . H. rreitag Lib1 a ~ ;

C . R. Anderson h!embe!\h~p C. \% . Hastlett Nosn~naticn\ B. B. CIauer Puhilcation> Poliib R. 0. Gaitchock Szct~oli\ 1, 6. RIrKnight Stnndards R. 1. Uo~ak Suitdlnin: h len~hersh~ps 1%. H. rrcitag 1 ellel4

SECTIONS British Canada Central Europe . Japan - Los Angeles

,Midwest . New York a San Francisco - Washington

ADMINISTRATION Dorothy H. Spronck Adminisrrat~ve Secretary

SOCIETY COMMUNICATIONS Manuscr iph , editorial and advertis~ng correspondence should be sent to Editorla1 Offices, Audio Engineering Society Journal. 124 East 40th Street, Piew York 10016. Addless all other Soclety busmess to the A u d ~ o Englneeri~lg Society, Room 929 L incoln Buildmg, 60 East 42nd St., New York, N.Y. 10017, Membership information and back copies may be obta~ned from either s f ice ,


ARTICLES

Deternlination of Loudspeaker Signal Arrival Times: Part I Rich'i~d C He!\er 7 3 1

Sobjecti\e Asaessnlent of MuItichaunel Reproduction Takes111 h;ahd~ ,tmn Tanetahi M ~ u r a Osami* KosnLa. M~ch io OBnmoto ‘inti T ~ h c o 7h1g.a -44

Sorrnd Sj\tern Ldesigl-i for St. Slarv '~ Cathedral. Sara kra~rcisco C h , ~ ~ l e s 2 C'tmnla 552

Prociuction of Harmonics and Distortion in p-u Jurlctions Rschald A Schartcr '59

A Sound Augrnentatioo Sjstem . . . . Donald C R l c C ~ o ~ b e i 764

Application of Electronic Circuit Analogies to 120nd~pe~her Desi51 Problems Bart N . L o ~ < ~ n r h ~ 778

PROJECT NOTES / ENGlNEERlNG BRIEFS

Low Power Drain Irrstrun~ent Preamplifier liobest F i‘>o>> n4 786


. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Resonance versus Resonant F. V. Hunt 792

Comnlents on "The Diamond as an 111dn5trial Il'fnierial, I F ith Spc~ia! Reference to Plrono Styli"

tE J Maictls and X1 1'. M a ~ c u s JAES 18 1 (1970)) . PClul 'A' kl l rs ih -92

Comments on "Sound the Destroyer" (Sound Track, JAES 19, 7 (1971)) . . . . . . . . . . . . . . . . . . . . . Ronald Sli~sser 792

What's a watt inlis)f . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7. Roberi sh l eb7 793

DEPARTMENTS

Rexriect' o f Acoilstical Patents . . . . 7 9 News of rhe Sections . . . . . . . . . . 8 11;

Standards . . . . . . . . . . . . . . . . . . . . 804 Shopping :be A ~ ~ d i o R'Ial-Let . . . 8 12

Sound Track . . . . . . . . . . . . . . . PO6 Available L.iterature . . . . . . . . . . $1.1

hlembership Infol-mation . . . . . . . X l h

EDITORIAL BOARD

J. R. Ashley R. C, Heyser D. S. McCoy A. P. G. Peterson D. M. Black J. M. Hollywood I. G. McKnight 42. R. Schroeder D. H. Cooper P. Bantrowitz R. A. Moog @. F. Snisher J. M. Eargle E. L. Kent A. R. Morgan E. L. Toriek E. .T. Foster D. L. Klepper J. T. Mullin D, W. von ReckPingZIarrseo M. B. Gardner J, H. Kogen R, E. Owen J. G. Woodv ard

Robert 0. Fehr Editor Jacqueline Harvey Managing Editor Evelyn A. Morris Production Editor Ingeborg M. StochmaP Copy Editor


Journa l o f t h e Aud lo E n g i n e e r ~ n g Society. Vo lume 19, No. 9, Oc tober 1971. Publ ished rnon th iy b y :he Aud io Eng tneer ing Society a n d s u p p l ~ e d t o a i l m e m b e r s I n good s tznd ing . Pub i i ca t~or , offrce 104 L tber ty Street , Ut ica, N . Y . 13502. E x e c u t ~ v e offrce, R o o m 929, L inco ln B u i l d ~ n g . 60 East 4 2 n d Street . Nev i York , IU Y 10017 Ln te red as second c lass m a l l a t the p o s t o f f ~ c e a t C ~ . c a . N Y S L ~ . scriptlor1 t o nonn:emi?er i $30.CO per ye? [ C o ~ y r l g h t 1071 by ? h e Audio Eng inee i ing Snc le ry . The Journa l i s indexe:i i n !he App l ied Science & T e c h n o l o g y Index. The Journa l o f t i l e Aut!io E r w n e e ' i r g Soclety hereby g:ants pevmission t o l e p r i n t i r ;;a-t, an, paper In ? ) > I S i i s u e i f o l : ? c t peirn7i is lon 15 o b t a ~ n e d f r o m ~ t s author:^! a n d crer i i t , s &,Len to ? h e a ~ l t h o r ( c l a n d t h l s jou rna l , An au thor , o r h i s research af i i l la te m a y reproduce his paper i n f c i ! crediting 1t115 journal Tnis p e r n ) i s i # o n 15 n o t ?;signable. The "Journa l of the Aud io Eng ineer ing Society" a n d i t s cover design h a s been r e g ~ s t e r - e i as i- t v a d e i a r k i n the Un i ted States Ps ten t Offrce.

OFFICERS 1971-72 J. G. Woodward Presldelit Hugh S. Allen. Jr. Excc~rtivc Vice-President Donald W. Powers Ea5tern Vice-President C. Roger Anderson Central Vice-P~esident Leon A. Wortman Western Vice-president Donald J. Pluiikett Secretary Arthur E. Grnber Treasurer

BOARD OF GOVERNORS George W. Bartlctt Benjamin B. Raner K. T. Bozak Marvin Camras Frederick V. IIunt J. G. McKnight J. 1,. Ooms Willialn I,. Robinson John E. Volkmann

COMMITTEE CHAIRMEN M. Camras Admissions F. V. Hunt Awards L. A. Wortman 42nd Convention D. W. Powers 43rd Convcntion H. S. Allen, Jr. Convention Policy J. G. Woodward Executive Committee J. Harvey F,xhibits A. E. Gmrber Finance J. D. Colvin Historical '11'. L. Kobinson Laws Kc Resol~dions Mr. H. Freitag Library C. R. Anderson Membership C. W. Bartlctt Nominations B. H. Hauer 1'~tblications Policy I$. 0. Kaitchuck Sections J. G. McKnight Standards R. T. Bozak Sustaining Men~berships 'W. 11. Freitag Tellers

SECTlONS British - Canada . Central Europc . Japan - Los Angeles

Midwest - New York San Francisco - Washington


SOCIETY COMMUNICATIONS Manuscrlpt5, editorial anti advertising correspondence should be sent to Editorial Offices, Audio Engineering Society Journal, 124 East 40th Street, New York 10016. Address all other Society business to the Aud~o Eng~neering Societv, Room 929, 1 incoln Building, 60 East 42nd St., New York, N.Y. 10017, Membersh~p ~nfol mation and back coples may be obtained from either office. .-G3-

AUDIO ENGINEERING SOCIETY

VOLUME 19 NUMBER 10

ARTICLES

Andio Cassette Chron~i~llll Dioxide Tape Klaus E. Naanrann and Eric D. Daniel F 2 2

Determination of Londspeaker Signal Arrival Times: Part I1 Richard C. Heyser 829

. . . . . . . . . . . . . . . . . . . . . . Analysing Phase-Amplitude Matrices Peter Schrciber 835

. . . . . . . . . . . . . . . . . . . . Honl-Loaded Electrostatic Loudspeaker Josef Merhaut 840

Groove Echo in Lacquer Masters Daniel W. Gravereaux and Renjalnin R. Bauer 847

An Electronically Generated Complex Microtonal System of Horizontal and . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Vertical Tonality David S. Goldsmith 85 1

Weighted Peak Ilutter Measurement-A Soninlaq of the Ncw IEEE Standard J. G. McKnight 859

PROJECT MOTES / ENGlMEERlNG BRIEFS

. . . . . . . . Efficiency of Direct-Radiator Loudspeaker System.; Richard H. Small 562

Efficiency Does Not Depend On Cone Area . . . . . . . . . . . . J. Robett Asllley 863

Single-Bus Keyboard Control for Digital Musical Instnllnents Ralph W. B ~ r r h a ~ s 865

DEPARTMENTS . . . . . . . . . . . 41st Convention . . . . . . . . . . . . . . 866 Available 1,iteratul-e 894

. . . . . . . . . . . . . . . . . . . Completc Convention PI-ogram 876 Sound Track 893 . . . . . . . . . . . . . . . . . . . . . . . . Standards 889 Shopping the Att~iio Marhct 895

. . . . . . . . . . News of the Sections 891 Membership Infornlation ....... 856 . . . . . . . . . . . . . . . . . . . . . Editorial 859

EDITORIAL BOARD

J. R. Ashley R. C. Heyser D. S. McCoy A. P. G. Peterson D. M. Black J. M. Hollywood J. G. McKnight M. R. Schrneder D. H. Cooper P. Kantrowitz R. A. Moog C. F. Swisher J. M. Earglc E. L. Kent A. R. Morgan E. L. Torick E. J. Foster D. L. Klepper J. T. Mullin D. R. von Recklinghausen M. B. Gardner J. H. Kogen R. E. Owen 9. G. Woodward

Robert 0. Fehr Editor Jecclueline Harvey Managing Editor Evelyn A. Morris Production Editor Ingeborg M. Stochrnal Copy Editor

IIarry F. Olson Editor Emeritus

Journal of the Audio Enaineerina Societv. Volume 19. No. 10. November 1971. Put ! is t~ed monthlv by the Audio ~ n g i n e e r i n e ~ o c i e t y a n d subplied t o al l member; i n good standing. P ~ b l i c a t i o n office, 104 Liberty Street. Utica, N.Y. 13501. Fxecut~ve office, Room 929, Lincoln B u ~ l d ~ n g . 60 Cast 42nd Street, New York. N.Y. 10017. Entered as second class mai l a t the ~ o s t o f f~ce at Utica. N Y. Sub- scr~ptcon to nonmembers, 830.00 per year. Copyright 1 3 7 1 by the A ' L I ~ I ~ Cnginecr~ng s"ciety. The Journal IS indexed In t he Applied Sclence &Technology Index. Tt ic Journal or the Audto tngineer~r:g Soclety hereby grant5 permiis ion to Irepr~nt In par!, any pa1,er in this ii:,ae I: d ~ r e c t petn i is i ion is obtained frorn ~ t s author(si and c r e d ~ t is glven t o t h e author(sl and this journal. An author, or his reseatch afftl iate mav rcoroduce his oaoer in iuli . , . . c r e i l ~ l ~ r l g t l i ls journal. T h ~ s permisston 1s not ass~gnable. The "Journal of Llie Audio Engineering Society" and ~ t s cover design has been registered as a t rademark ~n t he United States Patent Off~ce.

OFFICERS 1971 -72 J. G. Woodw3ard President Hugh S. Allen, Jr. Executive Vice-President Donald W. Powers Eastern Vice-President C. Roger Anderson Central Vice-President Leon A. Wortman Western Vice-President Donald J. Plunkett Secretary Arthur E. Grnber Treasurer

BOARD OF GOVERNORS George W. Bartlett Benjamin B. Bauer R. T. Bozak Marvin Camras Frederick V. Hunt J. G. McKnight J. L. Ooms William L. Robinson John E. Volkmann

COMMITTEE CHAIRMEN M. Camras Admissions F. V. Hunt Awards L. A. Wortman 42nd Convention D. W. Powers 43rd Convention H. S. Allen, Jr. Convention Policy J. G. Woodward Executive Committee J. Harvey Exhibits A. E. Grnber Finance J. D. Colvin Historical W. L. Robinson Laws & Resolutions W. H. Freitag Library C. R. Anderson Membership G. W. Bartlett Nominations B. B. Bauer Publications Policy H. 0. Kaitchuck Sections J. G. McKnight Standards R. T. Bozak Sustaining Memberships IT. H. Freitag Tellers

SECTIONS British Canada . Central Europe Japan Los Angeles

Midwest . New York San Francisco . Washington


SOCIETY COMMUNICATIONS Manuscripts, editorial and advertising correspondence should be sent to Editorial Offices, Audio Engineering Society Journal, 124 East 40th Street, New York 10016. Address all other Society business to the Audio Engineering Society, Room 929, Lincoln Building, 60 East 42nd St., New York, N.Y. 10017, Membershi'p information and back copies may be obtained from either office. -:

i / JOURNAL OF THE

I AUDIO ENGINEERING SOCIETY

VOLUME 19 NUMBER 11 DECEMBER 1971

ARTICLES Determination of Loudspeaker Signal Arrival Times: Part I11

Richard C. Heyser 902 . . . . . . . . . . . . . . . . . . Design of a Noise Eliminator System Richard S. Burwen 906

Theoretical Influences Caused by Geometrical Errors ill Magnetic Tapes and . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Recording Heads Reginald Morris 9 12

Articulation Loss of Consona~~ts as a Criterion for Speech Transmissio~~ in a Room . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V. M. A. Peutz 915

Articulatio~~ Loss of Consonants as a Basis for the Design and Judgment of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sound Reinforcement Systems W. Klein 920

Electrical Design and Musical Applications of an Unconditionally Stable Com- . . . . . . . . . . . . bination Voltage Controlled Filter/Resonator Dennis P. Colin 923

. . . . . . . . . . . . . . . . . . . A Time-shared Hybrid Sound Synthesizer David Friend 928

PROJECT NOTES /ENGINEERING BRIEFS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Notes on Panpots Robert Orban 936

A Visual Display of Tape Modulation Noise with Audio Recording. . Jan Melis 939

LETTERS TO THE EDiTOR . . . . . . . . . . . . . . . . . . . . . . . . . IEC Standardization Work Herman A. 0. Wilms 942

Comments on "A Compatible Stereo-Quadraphonic (SQ) Record System" (Benjamin B. Bauer, Daniel W. Gravereaux, and Arthur J. Gust, JAES 19, 8

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (1971)) James B. Cunningham 942 Reply to "Comments on 'A Compatible Stereo-Qnadraphonic (SQ) Record

System' " . . . . . . . . . . (James B. Cunningham, JAES 19; 11 (1971)) Benjamin B. Bauer 942

DEPARTMENTS . . . . . . . . . . . Review of Aco~lstical Patents . . . 944 Available Literature 963

. . . . . . . . . . . . . . . . . . . . Standards 954 Shopping the Audio Market . . . . 966

News of the Sections . . . . . . . . . . 956 Membership Information . . . . . . . 968 . . . . . . . . . . . . . . . . . . . Sound Track 960 Obituaries 970 . . . . . . . . . . . . . . . . .

. . . . . . . . . . . Index to Volume 19 971

EDITORIAL BOARD J. R. Ashley R. C. Heyser D. S. McCoy A. P. G. Peterson D. M. Black J. M. Hollywood J. G. McKnight M. R. Schroeder D. H. Cooper P. Kantrowitz R. A. Moog C. F. Swisher J. M. Eargle E. L. Kent A. R. Morgan E. L. Torick E. J. Foster D. L. Klepper J. T. Mullin D. R. von Recklinghausen M. B. Gardner J. H. Kogen R. E. Owen J. G. Woodward



Journa l o f t h e Aud io Eng ineer ing Society. V o l u m e 19, No. 11, December 1971. Pub l i shed m o n t h l y b y t h e Aud io Eng ineer ing Society a n d supp l ied t o all m e m b e r s i n g o o d s tand ing . Pub l i ca t ion of f ice, 104 L iber ty Street, U t i ca , N .Y . 13502. Execut ive off ice. R o o m 929. L i n c o l n Bu i ld ing , 60 Eas t 4 2 n d Street . N ~ - N York, N Y. 10017. Entered as second c lass ma11 a t t h e p o s t of f ice a t ~ t i c a , N.Y. Sub- sc r lp t lon t o nonz iembers , $30 CS per !year. Co?yr :gh t 1 9 7 1 by t h e Aud lo Engineering S o c ~ e t y . T h e Journa l 1s lndexed ~n t h e App l led Science &Techno logy Index. The Journa l o f t h e Aud io Eng ineer lne S o c e t y hereby g r a n t s p e r m i s s ~ o n t o repr in t i n par t , a n y Daoer In t h i s issue i i d i rec t D e r n l s s l o n IS obtatned f r o m ~ t s au thor (s ) a n d c red i t is a l ven t o the author(s1 a n d t h i s iou rna l . ~n au thor , o r h i s research a f f i l i a te m a y reproduce h i s F a p e r . i n full crediting th!s journai . Th is p e r r n ~ s s i o n i s n o t assgnab le . The "Journal of t h e A u d i o Engineering Society" a n d i t s cover des ign h a s been reg is te red as a t r a d e m a r k i n t h e U n i t e d S ta tes Patent Offlce.

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Journal AES Volumen 10-19