In expressing sound intensity, we take 10-19 Wm-2, as the reference level. For ordinary conversation, the intensity level is about 10-6 Wm-2. Expressed in decibel, this is
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a
106
b
6
c
60
d
loge (106)
answer is C.
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Detailed Solution
Bel is log10II0. Here it is 6. In decibel, it is 60. SOUND LEVEL =S.L= log10110-6=6log1010=6 bel=60 dB