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A sound absorber attenuates the sound le...

A sound absorber attenuates the sound level by `20 dB`. The intensity decreases by a factor of

A

`100`

B

`1000`

C

`10000`

D

`10`

Text Solution

Verified by Experts

The correct Answer is:
A
It is known that when loudness decreases by `10dB`, intensity of sound decreases by a factor 10. Therefore, when loudness decreases by `20dB` , `i.e., 2xx10dB`, the intensity of sound would decreases by a factor of `10^(2), i.e., 100`.
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