The sound level of sound decreases by 10 dB as it pass through a wall of uniform composition.If the wall is replace with a similar wall having the same thickness,but an absorption coefficient double that if the first wall,the sound level of the same sound will decrease by ____ as it passes through the new wall.
A)10 dB
B)12 dB
C)20 dB
D)21 dB
E)100 dB

Question

Quizplus · Accepted Answer

Doubling the absorption coefficient of the wall results in doubling the sound attenuation, leading to a decrease of 20 dB.

The Sound Level of Sound Decreases by 10 DB as It