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Power radiated by a sound source

by Amith2006
Tags: power, radiated, sound, source
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May27-06, 09:39 AM
P: 421
A loud speaker having a circular opening of diameter 20 cm is emitting sound waves uniformly. The intensity of sound at the opening is 0.2 milli watt/m^2. What is the power radiated by the source?
I solved it in the following way:
Intensity = power/Area
Here Area = (pi)R^2
= 3.14 x 0.01
= 0.0314 m^2
Power = 0.2 x 0.0314 milli watts
= 6.28 x 10^(-6) watts
Is it right?
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May29-06, 09:09 AM
P: 421
Please respond.
Andrew Mason
May29-06, 06:50 PM
Sci Advisor
HW Helper
P: 6,672
Quote Quote by Amith2006
Please respond.
Amith, No one is responding to this because it is trivial. You are saying:

A/B = x

And then asking:

Does A = Bx?

This is hardly advanced physics.


Jun6-06, 03:32 PM
P: 464
Power radiated by a sound source

I think what he is saying is:

Does A/B = x ? In other words, does A = bx ??

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