| RPG DIFFUSOR SYSTEMS: News: DiffuseNews Archives: April 1999 |  |
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“Experimental confirmation of a prediction is merely a measurement. An experiment disproving a prediction is a discovery.” Enrico Fermi The AES SC-04-02 standards Working Group meeting on the Characterization of Acoustical Materials was held in Berlin in conjunction with the first ISO WG 25 Measurement of the Random Incidence Scattering Coefficient of Surfaces. The meeting was convened by Professor Jens Holger Rindel, TUD, Lyngby, Denmark. In attendance were Professor Gerrit Vermeir, Katholieke Universiteit Leuven, Belgium, Prof. Dr. Michael Vorlander, ITA, Aachen, Germany, Dr. Eckard Mommertz, BBM, Munich, Germany, Mr. Tor Halmrast, Statsbygg, Oslo, Norway, Dr. Trevor J. Cox, Salford University, Salford, UK, Dr. James Angus, University of York, York, UK, Dr. Y. W. Lam, Salford University, Salford, UK, and Dr. Peter D’Antonio, RPG Diffusor Systems, Inc., USA. The work done by AES SC-04-02 was reviewed and a liaison between the two working groups has been established. The AES group will continue to develop a method to characterize the quality of scattering surfaces in terms of the uniformity of diffusion. We 25 shall consider a random incidence scattering coefficient that can be applied in room acoustic calculations and simulation models, but this will not be a measure of the uniformity of diffusion. Decisions were made on definitions, terminology, and the principle of the random incidence measuring method. A program was set up with a list of problems to be considered by the members before the next meeting. Two more meetings are planned: November 1999 in Munich and April 2000 in the UK. A committee draft is due before July 2000. Since the scope of AES SC-04-02 is broader, it will evaluate the recommendations of ISO 25 for inclusion into its information document. The ASA/EAS meeting in Berlin was very well attended with acousticians from around the world. The papers on architectural acoustics covered the spectrum from Epidaurus to the sensitivity to auralize the effects of diffusion coefficients in geometrical room modeling programs. Berlin seems like the largest construction site in the world, with major construction at the Reichstag, Potzdammer Platz, and sites along the Berlin wall. There is plenty for tourists to see, and plenty of unfortunate past history to reflect on. We enjoyed a wonderful dinner party hosted by Dr. Wolfgand Ahnert in the former East Berlin. Berlin will be interesting to re-visit in about five to ten years when the dust settles. RPG®’s manufacturing facility is a stones throw from the English Channel and Tunnel and the view of freshly plowed wheat fields, sheep, and the sea are a sharp contrast to our Upper Marlboro, MD facility. Room Optimizer™ Room Optimizer™ is now available for $99.99 and the phone hasn’t stopped ringing. Dr. Peter D’Antonio authorized the price reduction “to allow the program to find its way into the hands of the many end users that have expressed interest.” Comparisons between experimental measurements and predictions have verified the usefulness of the program. Stay tuned to the Web site to developments. Education The Peabody master classes are drawing to an end. The students have undertaken a term project to rennovate the design of the control room. Construction will commence this May and be finished for the Fall semester. The new design has been an excellent hands on approach for students to learn by doing. The Cleveland Institute of Music class will explore developing new techniques for recording instruments in an anechoic chamber for use in virtual room auralizations. Level calibrated recordings will be made in the anechoic chamber at Audiotechnica in Ohio. We want to thank them for their hospitality. |
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DiffuseNews April 1999
Current Projects Sony M1 New York, NY Muziekcentrum Eindhoven, Netherlands Post Logic Valencia, CA Foxley Hall Orem, UT Zomba Recording Services New York, NY Dutch Fork High School Columbia, SC MATK Pasadena, CA Sweetwater Sound Fort Wayne, IN Clay Ostwald Miami, FL Paragon Sight & Sound Toledo, OH Anderson Residence Bay Harbor, MI Sony Music New York, NY Princeton University Princeton, NJ Sloyer Sound Bethlehem, PA Micworks Costa Mesa, CA Southside Christian Church Richmond, CA Washington Music Center Wheaton, MD Steven Klein Sherman Oaks, CA Dale Electronics New York, NY Acoustical Solutions Richmond, VA Audio Connections Verona, NJ Audio Advisor Kentwood, MI Salford University Manchester, UK |
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