Asked Dec 28, 2019

An airplane mechanic notices that the sound from a twinengine aircraft varies rapidly in loudness when both engines are running. What could be causing this variation from loud to soft?


Expert Answer

Step 1

The variation of loudness of sound can be understood from the concepts of beats.The phenomenon of beats is an interference effect that occurs when two waves with slightly different frequencies combine at a fixed point in space.


The sound waves produced from the air craft engines are in phase at one time causing loud sound and they are out of p...

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Wave Optics

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