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An emergency ambulance with switched on siren passes a person who is standing at the street. Note:This applet is not very realistic in one respect: As the Doppler effect should be seen as clearly as possible, the sound waves have a smaller velocity than in reality.
URL: http://home.a-city.de/walter.fendt/physengl/dopplerengl.htm
© Walter Fendt, February 25, 1998 Last modification: September 23, 1999 
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