Doppler Effect in sound
Doppler Effect in sound: Overview
This topic contains concepts like Doppler's Effect in Sound, Doppler Shifts, Source Moving Away from Stationary Observer in Doppler Effect, and Source Moving towards Stationary Observer in Doppler Effect.
Important Questions on Doppler Effect in sound
Doppler shift :-
In case of doppler shift what will happen with the wavelength when both move away from each other.
Doppler shift :-
A source of sound is moving towards the observer then in Doppler shift wavelength ?
Doppler effect of sound depends on relative velocity between source and observer,
A sound source and listener are both stationary and a strong wind is blowing. Is there a Doppler effect?
A table is revolving about its axis at a rate of revolutions per second. A sound-source (frequency ) is fixed in the table at a distance of from the axis. Calculate the maximum and minimum frequencies as heard by a listener standing at a distance from the table. The speed of sound at the room temperature is .
A whistling engine, whose frequency is , is going towards a hill with a speed of . The driver of the engine hears an echo of the whistle. Find the frequency of the echo as heard by him.
A siren which is the emitting sound of frequency , is going away from a stationary listener towards a wall with a speed of .(a) What is the frequency of the sound heard directly from the siren? (b) What is the frequency of the sound heard after reflection from the wall? (c) What is the beat-frequency heard by the listener? (d) What, if the listener is between the siren and the wall? Speed of sound in air = .
A siren which is the emitting sound of frequency , is going away from a stationary listener towards a wall with a speed of . (a) What is the frequency of the sound heard directly from the siren? (b) What is the frequency of the sound heard after reflection from the wall? (c) What is the beat-frequency heard by the listener? (d) What, if the listener is between the siren and the wall? Speed of sound in air =.
A siren which is the emitting sound of frequency , is going away from a stationary listener towards a wall with a speed of . (a) What is the frequency of the sound heard directly from the siren? (b) What is the frequency of the sound heard after reflection from the wall? (c) What is the beat-frequency heard by the listener? (d) What, if the listener is between the siren and the wall?
Speed of sound in air = .
A siren which is emitting sound of frequency , is going away from a stationary listener towards a wall with a speed of . (a) What is the frequency of the sound heard directly from the siren? (b) What is the frequency of the sound heard after reflection from the wall? (c) What is the beat frequency heard by the listener? (d) What is the listener is between the siren and the wall?
Speed of sound in air = .
A whistling engine whose frequency is , is going away from an observer towards a hill with a speed of . What will be the frequency of sound heard directly from the engine and the frequency of the sound reflected from the hill as heard by the observer?
Two trains, both at speed, cross each other. One of the trains whistles whose frequency is . What frequency will be heard by a passenger in the other train (i) before crossing,(ii)after crossing?
Two trains, both at speed, cross each other. One of the trains whistles whose frequency is . What frequency will be heard by a passenger in the other train (i) before crossing, (ii) after crossing ?
Two trains are approaching each other with the speeds of . The frequency of the whistle of one train as heard by a passenger in the other train is . Find : (i) the real frequency of the whistle and (ii) the frequency of the whistle heard by the passenger when the trains have crossed each other.
Two trains are approaching each other with the speeds of . The frequency of the whistle of one train as heard by a passenger on the other train is . Find : (i) the real frequency of the whistle before the trains meet and (ii) the frequency of the whistle heard by the passenger when the trains have crossed each other.
With what velocity should a source of sound travel towards a stationary observer so that the apparent frequency may be double of the actual frequency? Velocity of sound is .
With what velocity should an observer move towards a stationary source so that the apparent frequency is double the actual frequency? The velocity of sound in air is .
With what velocity should an observer go away from a stationary source of sound so that the frequency of the sound as heard by him is half of the actual frequency ?
