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New Article Reviewing Evolution and Impact of Diffusion Technology
RPG has updated it bibliography of published articles and sorted by year. We invite you to download the pdf of an interesting review article entitled “Engineering Art: the science of concert hall acoustics” by Dr. Trevor J. Cox and Dr. Peter D’Antonio

Abstract
Modern concert hall design uses science and engineering to make an acoustic which embellishes and enhances the artistry of the musicians. The modern discipline of concert hall acoustics is a little over a hundred years old, and over the last century much has been learnt about how to ensure the audience receives high quality sound. During this period, knowledge from a large number of disciplines has been exploited. It is the intention of this paper to illustrate how disciplines as diverse as X-ray crystallography, psychology, and mobile telephony have influenced acoustic design. The paper will concentrate on the design of acoustic diffusers for concert halls, as this is a topic currently attracting considerable interest within the acoustics industry and academia.

RPG presents invited paper at International Symposium on Room Acoustics: Design and Science 2004
New Article Reviewing “Surface characterization for room acoustic modelling and design”

Abstract
In recent years there has been increasing interest in methods for characterizing the scattering (or diffusion) from surfaces. Interest has arisen because correct modelling of scattering is important to gain accurate predictions from geometric room acoustic models. Furthermore, there has been an increased understanding of how important scattering can be to the quality of a room acoustic, which means that practitioners need to be able to compare the performance of diffusing surfaces and draw up performance specifications. There have now been a series of investigations into how surface scattering can be characterized for the use of room modellers, diffuser designers and consultants. In many ways, the scattering and diffusion coefficients are meant to serve a similar purpose to the more familiar absorption coefficient, facilitating the design of absorbers and rooms, and the accurate prediction of acoustics. This paper will review the current methodologies for characterizing surface scattering and diffusion coefficients. Measurement and prediction methods will be discussed. The two coefficients being standardized will be compared and contrasted to highlight their weakness and strengths. The use of the coefficients in diffuser and room design will be briefly presented, and the role of scattering coefficients in geometric models will be discussed. Possible developments for the future will be outlined.

RPG Exhibits at CES, Las Vegas
RPG collaborates with hardware manufacturers to improve their demo rooms

RPG at CES/THE Show, Las Vegas
RPG collaborated with Rives Audio and several high end speaker manufacturers to improve the acoustics of their demonstration rooms at the CES Convention in Las Vegas. At one of the busiest shows in several years, participants were able to enjoy high quality listening demonstrations of the latest offerings from Talon Audio, Von Schweikert Audio and Harbeth Speakers in rooms with minimal acoustic distortion due to the technology provided by RPG's Variscreens, Skylines and Skyline LP sound diffusors. The enhanced listening environment was applauded daily in the Live Music Recording and Playback Demonstration of the bluegrass group Misty River in the Von Schweikert Ballroom. If you missed RPG in Las Vegas, be sure to stop by and say hello at our CEDIA booth in September.

RPG provides Bi-Weekly Acoustical Continuing Education Series Diffuse Bulletins
Diffuse Bulletins provide acousticians with continuing education series Diffuse Bulletins, dB_1

RPG Diffuse Seminar Series Dates for 2004 Announced
RPG’s Diffuse Seminars strike a chord with specifying design professionals. Read More