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An electronic point source emits sound isotropically at a frequency of 3 × 103 Hz and...

An electronic point source emits sound isotropically at a frequency of 3 × 103 Hz and a power of 34 watts. A small microphone has an area of 0.72 cm2 and is located 198 meters from the point source.

1)

What is the sound intensity at the microphone ?

I =

2) What is the power intercepted by the microphone?

Pin =

3) How many minutes will it take for the microphone to recieve 0.2 Joules from this sound?

ΔT =

4)

What is the sound intensity level at the microphone from this point source?

Β =

5) What would be the sound intensity level at the microphone if the point source doubled its power output?

Β =

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