Norxlestructive control of sheets for welded pipes carried out in the phase with the pro- duction by means of the employ of ultrasonic WPVt?S

Moretti, A., Pizzimenti, A., Ladiana, B. MetaIlurgica Italiana, Vol 60, No 4 (April 1968) (Proceedings of the 5th Seminar on Nondestructive Testing, Sirmione, March 1967) pp 234-240 (In Italian) (1152)

An ultrasonic pulse flowmeter and its accu- racy Obraz, J. SNTL Technical Digest, Vol 10, No 10 (Octo- ber 1968) pp 632-636 (1153)

Investigations of measurements of ultrasonic flow by utilization of the Doppler effect Pfau, B., Messmer, K., Meisner, H., Hagl, S. Chemie-Ingenieur-Tech& Vol 40, No 19 (4 October 1968) pp 952-956 (In German, French and English Abstracts) (1154)

Influence of the thermal treatments on the evaluation, by means of ultrasounds, of the defects in big steel forgings Ravyzza, P. Metallurgica Italiana, Vol 60, No 4 (April 1968) (Proceedings of the 5th Seminar on Nondestructive Testing, Sirmione, March 1967) pp 269-2’75,284 (In Italian) (1155)

Nondestructive controls of manufacture on finned sheath tubes for orgel type nuclear fuel elements (Using internal ultrasonic probes. Defect significance) Robba, M., Martelli, C. Metallurgica Italiana, Vol 60, No 4 (April 1968) (Proceedings of the 5th Seminar on Nondestructive Testing, Sirmione, March 1967) pp 293-30’7 (In Italian) (1156)

Determination of depth of fusion in fianged welds (Using ultrasonics) Safonov, A. I., Savchenko, V. P. Defektoskopiya, No 6 (1968) pp 78-79 (In Russian) (1157)

Development of the under-sodium ultrasonic scanner (Equipment development including transducers and ultrasonic camera) Scott, C. C., Kova, L. R. United States Atomic Energy Commission Report APDA-210 Addendum (1 June 1968) 9 pp (1158)

An automated ultrasonic flaw detection sys- tem for large thick-walled pipes Shalashow, G. I., Diozu, I. G. Defektoskopiya, No 6 (1968) pp 19-23 (In Russian) (1159)

Ultrasonic defectoscopy Shrayber, D. S. US Government Report AD-670,980 (FTD- MT-66-45) 410 pp (Translated from Russian) (1160)

Automatical control of concrete bars by means of the method of ultrasounds Simonetta, F. Metallurgica Italiana, Vol 60, No 4 (April 1968) (Proceedings of the 5th Seminar on Nondestructive Testing, Sirmione, March 1967) pp 241-244 (In Italian) (1161)

Acoustic probe for boreholes Societe de Prospection Electrique Schlum- berger French Patent 1,550,174 (1968) (Applied for 23 August 1967) (1162)

Reference blocks for ultrasonic testing of engineering materials Swamy, S. G. N., Mahajan, P. C. Central Mechanical Engineering Research Institute Report No Al4 (N68-25811) (Decem- ber 1967) 14 pp (1163)

Seismic digital data yieiding method Texas Instruments Inc German Patent 1,448,724 (1968) (Applied for in May 1964) (1164)

Thickness gauging by ultrasonic spectro- metry Tokarev, V. A.,Averbukh, I. I. Defektoskopiya, No 6 (1968) pp 5-10 (In Rus- sian) (1165)

IJItrasonic probing of plastic waves Wright, T. W. United States Government Report AD 672058 (BRL R 1400) (May 1968) 18 pp (1166)

SurveiIIance and inspection programs for LACBm reactor pressure vessel and asso- ciated piping and equipment inspection pro- gram development. Topical report 4. (Com- parison of ultrasonic, magnetic and visual methods and equipment for inspection of welds) Wylie, R. D. United States Atomic Energy Commission Report SWRI-12228P-11-7 (1968) 11 pp (1167)

Automatic ultrasonic testing of pipe welds Zhuravel, V. I. et al Defektoskopiya, No 6 (1968) pp 24-27 (In Russian) (1168)

New acoustical tool scans well bore Oil and Gas Journal, Vol 66, No 49 (2 Decem- ber 1968) pp 42-43 (1169)

Ultrasound detects wood defects Science Journal, Vol 5, No 1 (January 19691 (1170)

Symposium on the coupling of ultrasonic probes to hot surfaces (Report) The Journal of the Non-Destructive Testing Society of Great Britain, Vol 10, No 3 (Sep- tember 1968) pp 59-61 (1171)

Communication and Control

Ultrasonic wave transmission devices Papadakis, E. P. US Patent 3,400,340 (3 September 19681 (Filed 4 August 1964) An ultrasonic delay line comprises the delay medium itself, an electromechanical input transducer to generate an ultrasonic wave and one or more output transducers. The delay medium consists of an elongated in- tegral member, the first part of which has very low absorption properties and the sec- ond half has very good absorptive properties for acoustic energy. The middle phase is designed to produce a good impedance match- ing between the two extremes. The design minimises reflection of acoustic energy back into the first half of the delay time. (1172)

Elastic dispersive delay lines Sittig, E. K. US Patent 3,400,341 (3 September 1968) (Filed 8 March 1966) A dispersive elastic wave delay line at one end of which is located a transducer for pro- ducing an elastic wave in a given direction, and for extracting reflected wave energy. Reactive discontinuities are disposed along the delay line to reflect portions of the input energy towards one end. They are arranged so that signal components of different fre- quencies are reflected from different dis- continuities in the line. (1173)

International standard is&ion in underwater sound measurements Tratt, W. J. Acustica, Vol 20, No 3, pp 169- 181 The paper is presented in conclusion of a round-robin programme, amongst nine par- ticipating nations, to calibrate hydrophones. It was hoped that the tests might result in a design of an internationally standardised hydrophone. Ten different types of hydro- phone are described and relevant specifica- tions are presented. The facilities, available for calibration, in each of the member corn-- tries are reviewed. A discussion of calibra- tion methods and techniques is concluded by

graphical representation of free voltage sen- sitivity, as observed for each hydrophone. Analysis of data yields a measurement varia- tion of 7% or i 2dB. Average deviation for each hydrophone is tabulated. (11’74)

Near-field effects in electronic scanning sonar Tucker, D. G. Journal of Sound and Vibration, Vol 8. No 3 (November 1968) pp 355-363 Theory and results on short-range detection, location and identification of targets is prc- sented. It shows that in multiplicative signal processing the effective array beamwidth is half that obtained from the array used nor- mally. The signal obtained is a direct cur- rent varying in amplitude according to the modulation on the acoustic signal and there- fore represents the target information. The beam pattern is a variation of this DC ampli- tude for constant echo intensity. For experi- ments in air at 2OkHz, the receiving array was 90cm long giving a 1” far-field beam- width, and a near field out to 54m. Beam response was measured with the source at 20n1, using a 30” scanning sector. Using two closely-spaced spherical targets at the same range, the experiment was repeated at 37kHz in water, with a receiver 1. 56m long. (1175)

Sonar picks up stirrings in Loch Ness Braithwaite, H. New Scientist, Vol 40, No 628 (19 December 1968) pp 664-666 (1176)

Focusing of hypersound by light Chabin, A. A. Soviet Physics-Acoustics, Vol 14. No 1 (.July- September 1968) pp 123-124 (1177)

Direct estimation of a fish population acous- tically Cushing, D. A. Journal of the Fisheries Research Board of Canada, Vol 25, No 11 (1968) pp 2349-2364 (1178)

Engineering outline 159: underwater electro- acoustic transducers Gazey, B. K. Engineering, Vol 207, No 5360 (17 January 1969) (1179)

Elastic surface wave guide Meitzler, A. H., Tiersten, H. F. US Patent 3,409,848 (5 November 1968) (Filed 30 October 1967) (1180)

Operation of ultrasonic light modulators under conditions of random electrical excita- tion Minkoff, J. B. JASA, Vol 44, No 4 (October 1968) p 903 (1181)

Ultrasound for underwater detection and depth fii Pautte, J. Electronique, No 83-4F (October 1968) p 365 (1182)

Acoustic beam scanner Von Gutfeld, R. J. IBM Technical Disclosure Bulletin, Vol 11, No 6 (November 1968) pp 632-633 (1183)

Electronic scanning of focused arrays (Proof that effect of focusing is to shift the normal ‘far field’ directional pattern of an array from infiity to the focal surface. A problem in development of high-resolution somars) Welsby, V. G. Journal of Sound and Vibration, Vol 8, No 3 pp 390-394 (Received 1 April 1968) (1184)

Acoustic bench mark on the sea bed New Scientist, Vol 41. No 632 (1968) p 129 (1185)

Sonar system counts salmon Fishing News, No. 2897 (1968) p 4 (1186)

146 ULTRASONICS April 1969