Problem 4.182

A plane sound wave propagates along the $x$ axis. The damping coefficient of the wave is $\gamma=0.0230 \mathrm{~m}^{-1}$. At the point $x=0$ the loudness level is $L=60$ dB. Find: (a) the loudness level at a point with coordinate $x=50 \mathrm{~m}$ (b) the coordinate $x$ of the point at which the sound is not heard any more.