1. The problem statement, all variables and given/known data A sound source emits uniformly in all directions. It produces a sound level of 80dB at a distance 30m. What is the power of the emitting source. (W) 2. Relevant equations dB = 10log(I/Io) Io = 10^(-12) W/m^2 I = P/A 3. The attempt at a solution 80dB = 10^(-4) W/m^2 sound disperses in a sphere.. I = P/(4*pi*r^2) P = 10^(-4)*4*pi*(30)^2 = 1.13W This answer is not listed, although multiples of it, 2.26, 3.39, 4.52 are choices.