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Question

In a good auditorium the reverberation time is

A
0.17 V/A
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B
> 0.17 V/A
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C
< 0.17 V/A
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D
none of these
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Solution

The correct option is C < 0.17 V/A
The time for which sound continues to be heard (due to persistence) after the source has stopped producing the sound is called reverberation time . Sabine gave a formula for reverberation time of a good building , which is
T=0.16V/A ,
where V= volume of building in cubic metre ,
A= total absorption of building ,
hence option C is correct .

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