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explain why the sound of the fire truck siren seems fainter at first and becomes louder as it reaches you and then slowly gets fainter as it moves away from you​

Sagot :

Answer:

The tendency to increase or decrease the wavelength of the sound due to the motion of the source is called the Doppler effect. Hence, when the Fire truck is coming toward you, the wavelength is decreased and the pitch is above the pitch when the source is at rest.

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