The Sound Level of Sound Decreases by 10 DB as It

question 56

Multiple Choice

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

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