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14.3 a) If the sound intensity is 2.73 x 105 W/m, what is the intensity level in decibels? b) If the sound intensity is 7.45 x 107 W/m2, what is the intensity level in decibels?

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Answer #1

I( in dB) = 10 log ( I/ Io)

a)

I = 10 log ( 2.73*10^-5 / 10^-12)

I = 74. 36 dB

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b)

I = 10 log ( 7.45 * 10^-5 / 10^-12)

I = 78.72 dB

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Comment in case any doubt will reply for sure. Goodluck

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