At a distance of from a point source of sound

PHYSICS · Multi-part · A Level · Physics · Waves · Waves

Problem

At a distance of

20\ \text{m}

from a point source of sound, the sound level is

30\ \text{dB}

. Neglecting damping, find: (a) The sound level at

10\ \text{m}

from the source. (b) The distance from the source at which the sound is not heard.