Question

An electronic point source emits sound isotropically at a frequency of 5000 Hz and a power of 34 watts. A small microphone has an area of 0.79 cm2 and is located 156 meters from the point source. What would be the sound intensity level at the microphone if the point source doubled its power output?

Answer 1

A point source emitting sound isotropically means the ... To find the intensity level of the sound at the microphone all ... Psrc=34W; r=156m ⇒I(r)=1.397×10−3W m−2 .