How To: Do a demonstration of the Doppler effect

Do a demonstration of the Doppler effect

This video is an excellent example of how to demonstrate the doppler effect in the classroom.

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I posted to the forum explaining in detail why this Doppler effect is just a little off. When you get to speeds of 300 m/s when the speed of sound is 340m/s it is pretty obvious that it is wrong. It would be nice if someone could explain why I am wrong or confirm what I have argued or offer a better equation.

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