Question

A point source of sound produces a noise of 70 db at a distance of 20m from it. What will be the noise level at 80m from it

Answer 1

The sound pressure level (SPL) decreases with doubling of the distance by (−)6 dB. The sound pressure falls 1/2 times (50%) of the sound pressure of the initial value. It drops with the ratio 1/r of the distance. The sound intensity level decreases with doubling of the distance by (−)6 dB.

Answer 2

Answer:

The pressure Falls 1/2 by the 50%