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The sound intensity level near a loud radio is .0001 W/m^2. What is the intensity in decibels?

by Guest59224  |  earlier

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The sound intensity level near a loud radio is .0001 W/m^2. What is the intensity in decibels?

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  1. dB = 10 log[I/Io]

    I = 0.0001 = 10^-4 w/m^2

    Io = reference intensity for human year = 10^-12 w/m^2

    dB = 10 log[10^-4/10^-12] = 10 log [10^8]

    dB = 80 log(10) [10] = 80

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