To reduce reverberation time by 0.5 second. additional absorption

Direction: An auditorium having volume of 4500 cum and total absorption of all acoustic materials is 480 m² sabine

To reduce reverberation time by 0.5 second. additional absorption (m² sabine) required would be

To reduce t by 0.5 sec.
New value of t will be 1 sec.

t =	0.161 V
	S_a

1 =	0.161 × 4500	= 1.5 sec
	S_a

S_a = 724.5
Increase in S_a = 724.5 – 480 = 244.5 ≈ 240 m² sabine