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A window whose area is 2 m^(2) opens on ...

A window whose area is `2 m^(2)` opens on a street where the street noise results at the window an intensity level of `60 dB`. How much acoustic power energy from the street will it collect in a day?

Text Solution

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The correct Answer is:
A, B, C
By definition sound level `= 10 log.(I)/(I_(o)) = 60`
or `(I)/(I_(o)) = 10^(6)`
rArr `I = 10^(-12) xx 10^(6) = 1mu W//m^(2)`
power entering the room
`= 1 xx10^(-6) xx 2 = 2mu W`
Energy collected in a day `= 2 xx10^(-6) xx 86400`
`= 0.173 J`
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