Answer:
When
a vibrating object moves forward, it pushes and compresses the air in front of
it creating a region of high pressure called compression. This compression
starts to move away from the vibrating object. When the vibrating object moves
backwards, it creates a region of low pressure called rarefaction.
As the object moves back and forth rapidly, a series of compressions and rarefactions
are created in the air. These produce the sound wave that propagates through
the medium. This process continues until the sound wave reaches to the ear of
listener.
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