quarters, home theaters, recording/broadcast studios, sports

facilities, mechanical rooms, etc.. We also offer solutions for isolating

elevators and decoupling structural elements like stairways.

RPG has approached noise and vibration issues with the same fresh

approach and creativity that it used to develop the sound diffusion

industry. Our Noise and Vibration team consists of experienced

mechanical engineers, architects and Ph. D.s, with access to world

class testing and research facilities. Our product line utilizes the

widest range of elastomers, including natural rubber and

polyurethane foams (with the lowest resonant frequencies in the

industry), cork

rubbers, resin-

bonded recycled

car and truck tires

and microcellular

foams. The product

range consists of

traditional and new solutions to vibrational and airborne problems.

We invite you to visit our website and review these products. RPG

offers design assistance, load calculations, selection of appropriate

springs or elastomers and shop drawings. We also offer free Excel

software to predict the airborne transmission loss of our floor

isolators, using the Prognosis Method and free MathCAD software to

predict vibrational transmission loss for machinery on grade or upper

levels, with or without an inertia pad, using Mobilities.

CONTINUALLY EVOLVING.....

The illustration shows all of the potential vibrational and airborne

sound problems we offer solutions for with the CDM Noise and

Vibration System. This includes isolating subway and surface rail

vibrations, base building isolation of all forms, and innovative

floor, wall and ceiling isolators for performance spaces, living

Research & Development

BURJ KHALIFA, DUBAI, UAE

®

Everything Acoustic!From humble, cottage industry beginnings, RPG pioneered a

continually emerging sound diffusion industry. Its range of products

and services now includes TopAkustik, one of the industry’s leading

absorptive wood systems, and CDM, the industry’s newest, innovative

noise and vibration systems. RPG is unique in the architectural

acoustics industry in that we don’t just offer products. We strive to be

the acoustician’s partner; providing design assistance, free acoustical

testing, research results, reference text books, publications and personal visits. We invite you to visit our booth at ASA, Baltimore, where we

will exhibit the CDM Noise and Vibration System, as well as our subway and surface rail products. This is only the beginning.....

DIFFUSE NEWS

Volume 15, Issue 2, 2010The Newsletter for Progressive Acoustics Research

“The illustration shows all of the potentialvibrational and airborne sound problems weoffer solutions for with the CDM Noise andVibration System. This includes isolatingsubway and surface rail vibrations, basebuilding isolation of all forms, and innovativefloor, wall and ceiling isolators for perfor-mance spaces, living quarters, home the-aters, recording/broadcast studios, sportsfacilities, mechanical rooms, etc.. We alsooffer solution for isolating elevators anddecoupling structural elements like stair-ways.

RPG has approached noise and vibration

issues with the same fresh approach and

creativity that it used to develop the sound

diffusion industry. “

1. Diffuse News

CDM-ISO ELEVATOR-FIX

CDM Complete Noise and Vibration System

2. Research & Development

Burj Khalifa, Dubai, UAE

Dr. Peter D’AntonioPresident/CEO

The CDM-ISO-ELEVATOR-FIX quietsvibrational excitation by decoupling the

guiding rails from the shaft walls

Elevator Rail Decoupler

©2010, RPG DIFFUSOR SYSTEMS INC.

®

For up to the minute information, we invite you

to visit RPG’s acclaimed web site:http://www.rpginc.com.

IN THIS ISSUE

RPG and TopAkustik are proud to be selected to provide our most complex absorptive wood ceiling and custom

suspension system to date in the world’s tallest building. The project was a significant challenge due to the

technical aspects, the size and the prestige. RPG worked very closely on the Chairman’s Suites, which posed

many challenges most of which centered on the fact that there were no right angles or straight edges. The

project consisted of 750 custom, curved, rhombus-shaped panels with all sides of the panel radiused. The

panels were supplied with no further field cutting required, which demanded a high level of communication

and coordination. The perimeter of the complex ceiling array was required to follow the perimeter of the

building facade with a specified reveal. RPG was responsible for coordinating all field measurements and shop

drawings between all parties. To insure all panel perimeter shapes followed the curvature of the facade, RPG

engaged a surveyor to make thousands of measurements from the origin reference point to the perimeter on

three floors. A custom ceiling suspension system was also developed to accommodate the swaying of the

building. The other portion of this project that utilized TopAkustik materials was the Sky Lobby, and it

contained 1,800 pieces of Topperfo-M 16/16/6 with a Wenge veneer. The ceiling consisted of ten different

height levels and all of the 1,800 different elements had to be individually removable. RPG worked with

SOM Architects in Chicago and PMK Consultants to be specified on this project. The main contractor was

Heehoon/Samsung of South Korea and communication was key to a successful installation.

With complex projects like the Burj Khalifa, Dubai, The TimesCenter, NY and Morgan State University

Library (with 2,000 unique sized panels), RPG has established a reputation as a leader in designing and

supplying complex, custom engineered absorptive wood ceiling and suspension systems, using

Topakustik, Topperfo and the new Topperfo Micro (with 30,000 holes/sf) planks and panels . We invite

you to explore the possibilities.

Figure 2. An illustration of the Sky Lobby on floor 123 showing a reflected ceilingplan, photos of innovative ceiling treatment and the unique 16/16/6 Topakustikcurved absorptive wood ceiling system (lower right)

Figure 1. RPG now specializes in noise and vibrationisolation for every aspect of the built environment.

Figure 1. An illustration showing the location of the Chairman’s Suites on floors 152-154, the Sky Lobby on floor 123, a reflected ceiling plan of the 152nd floor andphotos in two indicated directions, showing the Topperfo Clou 8/8/2 ceiling system