Frequency Shifts: Doppler Effect & Wavelength

AI Thread Summary
The discussion centers on the Doppler effect, highlighting how frequency changes relative to the observer when a sound source moves. When the source approaches, the wavelength decreases and frequency increases, while the speed of sound remains constant, influenced by air density. Conversely, if the source moves away, the wavelength increases and frequency decreases. The relationship between velocity, wavelength, and frequency is confirmed by the equation Velocity = Wavelength * Frequency. Understanding these concepts is crucial for grasping the Doppler effect's implications in sound perception.
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Frequency changes relative to the observer due to the doppler effect. Does wavelength?
 
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BF3MW3 said:
Frequency changes relative to the observer due to the doppler effect. Does wavelength?

The velocity of the source is not the velocity of the sound wave that you hear coming from that source. The velocity of sound in air depends on the air density, etc., but not on the velocity of the source.

So now what do you think is the answer to your question?
 
the wave length becomes shorter ?
 
BF3MW3 said:
the wave length becomes shorter ?

When the sound source is moving towards you, yes. The sound velocity itself stays the same, and the wavelength shrinks and the frequency goes up:

Velocity = Wavelength * Frequency (check the units to be sure that I'm correct on this)

If the souce of the sound is moving away from you, what happens?

http://en.wikipedia.org/wiki/Doppler_effect

.
 

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