Question

The apparent frequency of a note when listener moves towards a stationary source with velocity 40 m/* is 200 Hz. When he moves away from the same source with same speed the apparent frequency of note is 160 Hz. Calculate velocity of sound in air.

Answer 1

When the listener move towards source

.....(1)

When the listener move away from the source

.....(2)

(1) ÷ (2),

Solving and finding v = 360 ms-1