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An ambulance fitted with a siren of v = ...

An ambulance fitted with a siren of v = 400 Hz is going towards a vertical wall at a speed of 54 km/hr. A person standing on the road, behind the ambulance, listens to the siren sound coming from the ambulance as well as that coming after reflection from the wall. Calculate the apparent frequency of the sound wave
(a) directly coming from the siren to the person, and
(b) coming after reflection from the wall
Take, speed of sound = 340 m/s

Text Solution

AI Generated Solution

To solve the problem, we will use the Doppler effect formula for sound. The formula for the apparent frequency \( f' \) when the source is moving towards the observer is given by: \[ f' = f_0 \frac{v + v_o}{v - v_s} \] Where: - \( f' \) = apparent frequency ...
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