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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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
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
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