Abstract
The reflection phase grating diffusor, RPG, which is based on mathematical number theory sequences suggested by Manfred Schroeder, has brought to architectural acoustics a missing design ingredient—broadbandwidth wide‐angle sound diffusion—and opened up many possibilities for acoustical consultants and architects. The RPG diffusor system was first introducted into the recording industry in 1983 and in the short span of 5 years has become a standard ingredient in hundreds of forefront recording/broadcast facilities, worship spaces, corporate conference/teleconference and A/V facilities, performing arts facilities, and home listening rooms. A few installations include The Oak Ridge Boys, Peter Gabriel, Whitney Houston, CBS Records, Telarc, DMP, Polygram, CBS‐TV, NBC, CBC, BBC, WQXR, WFMT, Houston Grand Opera, Chrysler Hall, Kentucky Center for the Performing Arts, Word of Faith Ministries, Crenshaw Christian Church, Clear Lake United Methodist Church, Duke University, SUNY, and Lakeland College. This presentation will comprehensively review the theoretical and experimental performance characteristics of the RPG and examine a broad spectrum of applications. Many case study photos and TEF time and frequency response measurements will be presented.
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