Is it possible that the apparent frequency of the sound heard by a moving listener is the same as the true frequency ? If so give an example,

State three factors which affect the loundess of a sound heard by a listener.

A source of sound is travelling towards a stationary observer. The frequency of sound heard by the observer is 25% more that the actual frequency. If the speed of sound is v, that of the source is

in which of the following case frequency of sound heard by the observer increases?

Assertion : A train is approachinng towards a hill . The driver of the train will hear beats. Reason : Apparent frequency of reflected sound observerd by driver will be more than the frequency of direct sound observered by him.

A car B, with a hom of frequency 700 Hz moves with a velocity 90 kmh^(-1). It approaches another car A, coming towards it with a velocity 72 kmh^(-1). Calculate the apparent frequency of the sound heard by the driver in the car A (a) before crossing (b) after crossing ? Velocity of sound =350 ms^(-1) .

A railroad train is travelling at 30 m/s in still air. The frequency of the note emitted by locomotive whistle is 500 Hz. What is the frequency of the sound waves heard by a stationary listener (a) in front of the train and (b) behind the train? (speed of sound is 345m/s.)

The engine of a train sound a whistle at frequency v, the frequency heard by a passenger is

Which frequency produces a sound that can be heard by a person?

A man is travelling in a train towards the station with a speed of 50 m/s. calculate the apparent frequency heard by him of whistle which is blown at the station with a frequency 200 Hz. Velocity of sound in air is 350 m/s.

(A): When an observer moves towards a stationary source, the frequency of sound heard is greater than the actual frequency (R) : Apparent frequency increases because the observer intercepts more number of waves when he moves towards the source.