# Sound Intensity and Power

1. Apr 12, 2012

### Triathlete

Second problem of the day...

1. The problem statement, all variables and given/known data

(part 1 of 2)
A spherical source radiates sound uniformly
in all directions. At a distance of 52 m, the
sound intensity level is 46 dB.
At what distance from the source is the
intensity level 13 dB?

(part 2 of 2)
What power is radiated by this source?

2. Relevant equations

I = P/A

A = 4$\pi$r2

3. The attempt at a solution

I got part 1, which is 2322.8 m. But I'm not sure where to go from here. All I know is I need to solve for P in the equation but I'm not sure what to do for I.