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Doppler Effect HTML5


The Doppler Effect is the change in the apparent frequency of a wave as the observer and source move towards or away from each other.
If the source moves at the same speed as the sound that it emits, it “breaks the sound barrier”. This speed is called Mach 1.

Click on to start any sequences (there are three to be viewed).

Learning goals

  • To illustrate the Doppler effect and a shock wave.

Learn more

Whenever a sound source moves quickly towards or away from an observer, the wave frequency seems to change : the noise sounds higher pitched when the source is moving closer and lower pitched when…

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