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What scientific term would be used to explain how an ambulance siren sounds different as it approaches you then when it moves away?
Wiki User
∙ 13y ago
The Doppler effect.
It defines the relative change in frequency and wavelength of any waveform perceived by the observer when the observer is at a distance from the source and not with it.
Check out a flash animation to understand this effect better.
Wiki User
∙ 13y ago
Wiki User
∙ 15y agoBecause of the Doppler Effect. See the link below. http://en.wikipedia.org/wiki/Doppeler_effect
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