Question

how does the sound is produced by a vibrating object in a medium reach your ear

Answer 1

The sound produced by a vibrating object reaches to our ears by vibrations in Molecules which is caused by the vibrating object

Answer 2

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When an object vibrates, it necessitates the surrounding particles of the medium to vibrate. The particles that are adjacent to vibrating particles are forced to vibrate. Hence the sound produced by a vibrating object in a medium is transferred from particle to particle till it reaches your ear.