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When a sound source approaches you, how does the pitch change?

User Souf Ee
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2 Answers

5 votes

Answer:

Pitch increases

Step-by-step explanation:

I did gradpoint :+)

User Moz Morris
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6 votes

Answer:

The pitch increases

Step-by-step explanation:

This effect is called Doppler effect. Doppler effect occurs when the source of a wave (such as a sound wave) moves relative to a stationary observer. In particular, two situations can occur:

- When the sound source moves towards the observer, there is a decrease in the apparent wavelength as seen from the observer; since frequency is inversely proportional to wavelength, the observer hears a sound with apparent higher frequency, which corresponds to a higher-pitch sound.

- When the sound source moves away from the observer, there is an increase in the apparent wavelength as seen from the observer; since frequency is inversely proportional to wavelength, the observer hears a sound with apparent lower frequency, which corresponds to a lower-pitch sound.

In this case, the sound source is approaching you: so we are in the 1st situation, therefore the pitch of the sound increases.

User Jo Hasenau
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