Question

When an object is approaching you while making a sound, the pitch of the sound is perceived to be ______

A. higher

B.fluctuating

C.lower

D.unchanged

Answer 1

i believe it would be A

Answer 2

Here when source of sound is coming closer to us then by doppeler's effect of sound we can say

`f' = f_o(v)/(v - v_s)`

so here frequency is perceived to be higher than actual frequency

This is due to the relative motion of sound source which approach to us.