The apparent frequency is `f_(1)` when a souece of sound approches a stationary obsever with a speed u and `f_(2)` when the observe approaches the stationary source with same speed. If v is the velocity of sound, then

Find the diffference is the apparent frequencies (i) When the source approaches a stationary observer (ii) When observer is approaching the stationary source. Take b as relative velocity in each case and upsilon as the velocity of the waves.

The difference between the apparent frequencies of a source of sound as perceived by a stationary observer during its approach and recession is 2%of the actual frequency of the source. If the speed of sound is 300 m/s, the speed of the source is

when a source of sound of frequency f crosses stationary observer with a speed v_(s) (lt lt speed of sound v) , the apparent change in frequency Δf is given by

when a source of sound of frequency f crosses stationary observer with a speed v_(s) (lt lt speed of sound v) , the apparent change in frequency Dealtaf is given by

When a source moves away from stationary observer with velocity v then apparent change in frequency is Deltan_(1) . When an observer approaches the stationary source with same velocity v then change in frequency is Deltan_(2) then

A sound source is moving towards a stationary observer with 1/10 of the speed of sound. The ratio of apparent to real frequency is