The sound distribution in a rectangular reverberation chamber

The spatial distribution of the sound intensity and the sound pressure in a rectangular chamber can be calculated by the geometrical ray acoustics method. The calculated results for a random point monopole sound source show that the spatial distribution of the sound intensity in a rectangular room roughly obeys the inverse-square law, and that the sound pressure contains an apparent reverberant part. These results are in very good agreement with experimental measurements. The reverberant part of the sound intensity is found to be nonzero, and the reverberant part of the sound pressure is not distributed evenly throughout the room. The fluctuation of the reverberant part of the sound field depends on factors such as the sound absorption of the room, the location of the measurement point, and the location of the sound source.