Question

The sound intensity level at a point 4 m from the point source is 10 dB,then what will be the sound level at a distance 2 m from the same source?

Answer 1

The sound level is `=16.02dB`

Explanation:

The sound level intensity decreases with the distance.

`L_2=L_1-10log_(10)(r_2/r_1)^2`

The sound intensity level is `L_1=10dB`

The distance is `r_1=4m`

The distance `r_2=2m`

`L_2=10-10log_10(4/2)^2`

`L_2=10-10*0.602`

`L_2=16.02dB`