Mean absorption coefficients and reverberation times for typical rooms
|Room Characteristics||Very Soft||Soft||Normal||Hard||Very Hard|
|Reverberation time |
- Ta -
|0.2 < Ta < 0.25||0.4 < Ta < 0.5||0.9 < Ta < 1.1||1.8 < Ta < 2.2||2.5 < Ta < 4.5|
|Typical Room||Radio and TV studio||Restaurant |
|Large church |
|Mean sound absorption coefficient |
- αm -
The mean sound absorption coefficient should be calculated when more accurate values are needed.
The diagram below can be used to determine the sound absorption in rooms of different sizes and with different accoustic characteristics.
- en: sound acoustics absorption coefficients reverberation times