Question

what is sound..........
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Answer 1

Answer:

Sound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid. In human physiology and psychology, sound is the reception of such waves and their perception by the brain. ... Sound waves below 20 Hz are known as infrasound.

Explanation:

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Answer 2

Answer:

Sound is defined as vibrations that travel through the air or another medium as an audible mechanical wave. It is produced from a vibrating body.