What is the intensity of a sound which has a sound level of 35 dB?

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What is the intensity of a sound which has a sound level of 35 dB?

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Answer 1 · 2015-04-19T00:11:58

You can use the relationship:
#I(dB)=10log(I/I_0)#
Where #I_0=10^(-12) W/m^2# represents the intensity just audible (correspnding to #0 dB#).
So:
#35=10log(I/10^(-12))#; power #10# both sides and rearrange:
#I=3.2xx10^-9 W/m^2#

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What is the intensity of a sound which has a sound level of 35 dB?

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