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

Question

The sound intensity level at a point 4 m from the point source is 10 dB, then the sound level at a distance 2 m from the same source will be (A) 26 dB (B) 16 dB (C) 23 dB (D) 32 dB

Tardigrade Admin · Accepted Answer

I propto (1/r2) ∴ If at two m intensity is I1 at 4 m, intensity is (I1/4)

Q. The sound intensity level at a point $4 m$ from the point source is $10 d B$ , then the sound level at a distance $2 m$ from the same source will be

26 dB

16 dB

23 dB

32 dB

$I \propto \frac{1}{r ^{2}}$
$∴$ If at two $m$ intensity is $I_{1}$ at $4 m$ ,
intensity is $\frac{I _{1}}{4}$

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