A sound absorber attenuaates the sound level by 20db . The intensity decreases by factor of {AIEEE 2007}
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A sound absorber attenuaates the sound level by 20db . The intensity decreases by factor of {AIEEE 2007}
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Answer:
answer is 100
Explanation:
Explanation :- Let intensity if sound be I and I' Loudness of sound initially ,
Given :- β₁-β₂ = 20
∴ 20 = 10log(I/I₀)-10log(I'/I₀)
20 = 10 log(I/I₀) [∵ logA - LogB = Log(A/B)]
Therefore, intensity decreases by factor of 100.