| RPG DIFFUSOR SYSTEMS: News: DiffuseNews Archives: March 1999 |  |
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“Basic research is what I am doing when I don’t know what I am doing.” Wernher von Braun (1912-77), German/American rocket engineer Basic acoustics research has always been the cornerstone of RPG®’s mission to continually expand the acoustical palette with innovative AcousticTools. This month the focus is on research as we are off to Berlin for the joint European Acoustical Association, the American Acoustical Society, and the German Acoustics DAGA meeting. This meeting offers several areas of interest for RPG® and we look forward to seeing our friends and sharing our research. The Architectural Acoustics sessions of interest to RPG® include: Concert & Opera Halls: Case Studies of New Halls and Opera Houses Modeling of Halls: Halls with Special Features Worship and Theater Spaces Perceptual Aspects in Rooms Verification of Auralization and Modeling Programs I & II Building Acoustics I: Airborne and Impact Sound Transmission and Classroom Acoustics Building Acoustics II: Reverberation, Absorption, and Scattering Building Acoustics II: Acoustical Measurements While in Berlin we will attend a CATT Acoustics luncheon and meeting to discuss the present and future direction of the program with its author Bengt-Inge Dalenback. We will also get additional training on the use of the program and discuss the round robin verification results presented at the meeting. We will also meet with Dirk Tournoy and Eric Reniers of RPG® Europe and discuss present and future projects, marketing, and future direction of European sales and service. We will also be introducing and training European representatives on new products and services. Following the meeting we will participate in the first ISO diffusion coefficient standards meeting (left sidebar). RPG® will make a presentation on the work done by AES SC-04-02 thus far. We are then off to merry old England to visit Brian Moule, head of our European manufacturing facility in West Hythe, Kent, UK. This new facility offers expanded molding capabilities and we are excited about the next generation of gypsum and Class A plastic products. Enhance the Performance. Silence the Noise. Over the past 15 years, RPG® Diffusor Systems’ commitment to fundamental acoustics research has provided the tools to design, measure, predict, optimize, and quantify sound diffusing surfaces. The first goniometer to measure the three dimensional directivity of scattering surfaces is now in use. Measured data are providing diffusion coefficients to evaluate scattering surfaces and improve the accuracy of geometrical prediction and auralization programs. Joint Diffusion Coefficient Standards Meeting Dr. Peter D’Antonio has chaired the AES Standards Committee SC-04-02 for the Characterization of Acoustical Materials from its inception. Recently, Dr. Trevor J. Cox has been appointed co-chair to assist in formulating a diffusion coefficient to quantify the diffusivity of potential scattering surfaces. A diffusion coefficient based on the autocorrelation of the 1/3-octave polar responses has been proposed as a potential metric. A new ISO international standards working group has been assembled by Prof. Jens Holger Rinder and Prof. Michael Vorlaender to explore a measurement standard for the random incidence scattering coefficient of surfaces. On Saturday, March 20, 1999 a joint meeting of the AES SC-04-02 and the ISO/TC 43/SC 2/WG 25 will be held at the Institute of Technical Acoustics in the Technical University of Berlin. The Agenda of the meeting will be as follows: Opening of meeting Roll call of the experts Adoption of the agenda Information on the work done by AES SC-04-02 Definition of the random incidence scattering coefficient Principle of the measurement method Program for the working group Any other business Date and place of next meeting Closing of meeting One of the goals of the collaboration of the two working groups is to define measurement methods for both the random incidence and diffusivity diffusion coefficients. A further goal is to determine the random incidence scattering coefficient from the 3D polar response measurements as well as BEM predictions for comparison and to provide a physical understanding of the coefficient. |
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DiffuseNews March 1999
Current Projects Cinerama Seattle, WA Master Mix Nashville, TN Bob Jones University Greenville, SC Cake Mix Plano, TX Frasier Homestead Telluride, CO CBS New York, NY Laraby Studios Universal City, CA Green Day Studios Oakland, CA Hollins College Roanoke, VA Ithaca College James Whalen Center, NY National Digital TV Denver, CO Deschamps Toronto, Canada Electronic Arts Toronto, Canada Wong Home Theater San Francisco, CA Terry Lewis Studio Maryland CNBC Washington, DC Metro Lighting & Sound Minneapolis, MN Rangel Studios San Antonio, TX Sjoen Studios Norway Elecktra Tech San Antonio, TX Julio Lamadrid Mexico The Art of Audio Beaverton, OR Sweetwater Fort Wayne, IN Transcontinental Studios Orlando, FL Big Dudes Music City Kansas City, MO Sloyer Sound Bethlehem, PA Unique Concepts South Carolina Carmen Studios Boca Raton, FL Cyberella Studios Abingdon, MD Full Compass Middleton, WI Kevin Sullivan Orangeburg, NY IRC Audio Indianapolis, IN Digital Mobile Recording Saddle River, NJ Union Grove Music Santa Cruz, CA Milich Home Theater Brooklyn, NY Eichhorn Home Theater Quincy, IL 8th Street Music Pennsylvania The Richards Group Dallas, TX Weinstein Home Theater Englewood Cliffs, NJ |
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