Approximate formula of the averaged sound energy decay curve in a rectangular reverberant room
Approximate formula of the averaged sound energy decay curve in a rectangular reverberant room
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矩形混响室平均声能衰减曲线的近似公式
DOI：
10.1121/1.387232
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发表时间：
1981
影响因子：
2.4
通讯作者：
S. Yoshikawa
中科院分区：
文献类型：
--
作者：
M. Tohyama;S. Yoshikawa
本文从理论上导出了矩形混响室中空间平均混响衰减曲线和系综平均混响衰减曲线的近似公式。这个近似的衰减曲线是由三种（斜向、切向和轴向）类型的漫射场的衰减曲线的总和来表示的。该公式不仅包含了墙壁的平均吸声系数，而且还包含了矩形混响室中激发的共振波模式数。稳态时三种扩散场的声能分布率由构成每种扩散场的共振波模式的数目之比决定。
An approximate formula of the space and ensemble averaged reverberation decay curve in a rectangular reverberant room is derived here theoretically. This approximate decay curve is written by the summation of the decay curve in three (oblique, tangential, and axial) types of diffuse fields. This formula contains not only the averaged sound absorption coefficient of the walls but the number of resonance wave modes excited in a rectangular reverberant room. The sound energy distribution rate of three types of diffuse fields at the steady state is determined by the ratio of the number of resonance wave modes constituting each type of diffuse field.