The capacity of a hall is 600 persons and its volume is

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The capacity of a hall is 600 persons and its volume is 3000 cu.m. If an optimum reverberation time of 1.0 second is to be achieved then the required total absorption (m² sabine) is _______

1. 375 to 385
2. 575 to 485
3. 475 to 485
4. 475 to 685

Correct Option: C

(475 to 485)

t_r =	0.1611 × V
	Sa

Sa =	0.1611 × 3000	= 483.30 sqm sabine
	1