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Does an ambulance siren's pitch really change - what if the ambulance was stationary?
Wiki User
∙ 10y ago
Modern electronic sirens change amplitude and pitch. Older sirens produced tones that changed in amplitude (volume) but were changed in pitch by their motion relative to the listener: increasing in frequency as they approached and decreasing in frequency when they moved away. This is called the Doppler Effect.
Wiki User
∙ 10y ago
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How are you able to hear the sound of an ambulance on the other side of a building?
The sounds reflect off of other surfaces. Usually the reflective sounds will create an illusion that they are coming from every direction. That's why city ambulances running lights/sirens often get in accidents, is drivers don't know where they are coming from and don't yield. Sirens are really loud...
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How are you able to hear the sound of an ambulance on the other side of a building?
The sounds reflect off of other surfaces. Usually the reflective sounds will create an illusion that they are coming from every direction. That's why city ambulances running lights/sirens often get in accidents, is drivers don't know where they are coming from and don't yield. Sirens are really loud...
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