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A room of 3m × 3m × 3m has a reverberation time of 0.8 sec. Using Sabine’s method, the total absorption in the room is _____________ sabin (up to one decimal place).
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- 2.3 to 9.7
- 4.3 to 6.7
- 5.3 to 5.7
- 6.3 to 5.7
Correct Option: C
5.3 to 5.7
RT60 is the reverberation time (to drop 60 dB)
V is the volume of the room
c20 is the speed of sound at 20° C (room temperature)
Sa is the total absorption in sabins.
| RT60 = | |
| c20Sa |
| 0.8 = | |
| 343Sa |
Sa = 5.43 sabin
