Reverberation Detail (chapter 7, Everest)
1. FYI:
a. Reverb was once considered the single most important characteristic of a room. This
is no longer the case it is only one of several important characteristics describing the
acoustic qualities of a room.
2. Reverberation and Normal Modes
a. If you measure TR using sine waves at low frequencies, one finds longer TR at various
frequencies corresponding to normal modes of the room e.g. fig 7-1
b. The peaks in the graph are not representative of the average properties of the
room. The idea of a single reverberation time of a room assumes
i. High modal density
1. Lots of modes near each other in frequency
2. Consequences of high modal density
a. Uniform distribution of sound energy
b. Random direction of propagation.
