Sound WavesHard
Question
A sound absorber attenuates the sound level by 20 dB. The intensity decreases by a factor of
Options
A.1000
B.10000
C.10
D.100
Solution
B1 = 10log
B2 = 10log
given B2 - B1 = 20
20 = 10 log
I′ = 100I
B2 = 10log
given B2 - B1 = 20
20 = 10 log
I′ = 100I
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