CHAPTER 17 Large Room Acoustics 6dB 1-2 dB of absorption 0 0 ft ms 360.5 319 0 0 A. With absorption curtain extended in an auditorium (absorption present),1 dB-2dB of absorption is very audible. ft 360.5 319 ms B. Auditorium with curtain retracted (without absorption). FIGURE 17.4 RT 60 measurement made with and without absorption. Importance of Sabine The work of W. C. Sabine founded the entire field of architectural acoustics and is fundamental to the successful interface of any electroacoustic system to the acoustic environment. A partial list of present