Question

In the figure shown below, a source of sound having power `12xx10^-6W` is kept at `O`, which is emitting sound waves in the directions as shown. Two surfaces are labelled as 1 and 2 having areas `A_1=2xx10^3m^2` and `A_2=4xx10^3m^2`, respectively
Q. If two persons (having almost same physique) `A` and `B` are standing at the location of surfaces 1 and 2, respectively, then who will hear a quiter sound?
A. Both will hear same sound.
B. A will bear a quiter sound
C. B will hear a quiter sound
D. information is not sufficient

Answer 1

Correct Answer - C
The intensity of sound received by listener B is less so he hears quieter sound