A source of sound and an observer are stationary relative to each other. If the speed of sound changes, then which one, the frequency or the wave length of sound heard by the observer, will not change.

If the wavelength of the sound waves is halved the frequency ____.(doubled)

When source of sound is moving toward the observer apparent wavelength of sound ____.

A source and an observer are approaching one another with the relative velocity 40m/s. If the true source frequency is 1200Hz, find the observed frequency under the following conditions : (I)All velocity is in the source alone (ii) All velocity is in the observer alone

What happens to the velocity of sound waves if temperature changes ?

A listener and a sound source are going with the same velocity in the same direction. What will be ratio of frequencies of source and frequency heard by listener?