The intensity of sound during the festival season increased by 100 tim

1.	The intensity of sound during the festival season increased by 100 times. This could imply a decibel level rise from - (A) 20 to 120 dB(B) 70 to 72 dB(C) 100 to 10000 dB(D) 80 to 100 dB
Answer» Correct option (D) 80 to 100 dB Explanation: Loudness of sound in decibel dB = 10 log₁₀ (I/I₀) when intensity of sound become 100 I then new decibel level = dB' = 10 log₁₀ (100I/I₀) dB' – dB = 10 log ₁₀ 100 dB' – dB = 20 ∴ decibel rise by 20 dB only one option i.e. 80 to 100 dB match with it

The intensity of sound during the festival season increased by 100 times. This could imply a decibel level rise from - (A) 20 to 120 dB(B) 70 to 72 dB(C) 100 to 10000 dB(D) 80 to 100 dB

Answer»

Correct option (D) 80 to 100 dB

Explanation:

Loudness of sound in decibel dB = 10 log₁₀ (I/I₀)

when intensity of sound become 100 I then new decibel level = dB' = 10 log₁₀ (100I/I₀)

dB' – dB = 10 log ₁₀ 100

dB' – dB = 20

∴ decibel rise by 20 dB

only one option i.e. 80 to 100 dB match with it

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The intensity of sound during the festival season increased by 100 times. This could imply a decibel level rise from - (A) 20 to 120 dB(B) 70 to 72 dB(C) 100 to 10000 dB(D) 80 to 100 dB

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