Question

As demonstrated by the Doppler effect, why does sound increase in pitch as a sound source approaches you?

Answer 1

This is because as it gets closer to you the wavelength shortens, the shorter the wavelength the higher the frequency the higher the pitch

Answer 2

Because of the increase in the frequency

Step-by-step explanation:

Doppler effect is the change in the frequency of a wave emitting from a source as its position changes with respect to the observer. As the wave source moves towards the observe the frequency of the wave increases and as the source moves away from the source the frequency decreases.

We know that for a sound wave as the frequency increases pitch increases. That is why the pitch of the sound increases as the sound source approaches us.