- #1

hellokitty

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## Homework Statement

A concert loudspeaker suspended high off the ground emits 36 W of sound power. A small microphone with a 1.0 cm^2 area is 48m from the speaker.

What is the sound intensity at the position of the microphone?

What is the sound intensity level at the position of the microphone?

## Homework Equations

I don't know where to begin. Which formulas do I use?

* I=P/4(pie)r^2 ?

*B(beta)= 10log( I/ Io)?

But it says the microphone is 1.0cmsquared area is 48 m? What does the distance x=48m fall into any of the formulas?

## The Attempt at a Solution

I Cannot solve this problem...help!