The intensity of sound from a given source is measured at two points all along a line from the source. The points are separated by 13.9 m, the sound level is 76.80 dB at the first point and 66.72 dB at the other point.
a) Determine how far is the source from the first point?
(Suppose an inverse square law, that is, the intensity falls off as 1/r^2)
b) Compute the power output of the source?