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What is it called when the change in pitch of a train's horn as it passes while you are standing still can be explained by?
Wiki User
∙ 9y ago
The change in pitch of a train's horn as it passes while you are standing still can be explained by the Doppler Effect.
Just as any other horn or fast moving sound, When a object emitting loud sound is coming towards you, the sound is compressed and sounds like a higher pitch. When the object is moving away the sound is expanded sounding like a lower pitch.
Wiki User
∙ 9y ago
Wiki User
∙ 9y agoIt's the Doppler Effect. :) My source is school studying. I was a valedictorian in high school. :-D
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The perceived pitch of the sound drops (frequency decreases) as the source transitions from approaching the listener to receding from the listener. The phenomenon is called the "Doppler shift", after the German Physicist who explained it and worked out the math.
Why is there a change in rate of energy exchange as time passes?
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