Question

what is sound??????????????????


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Answer 1

$\huge\tt{SOUND:}$

→ Sound is produced by vibrations. When an object vibrates, waves are generated by these vibrations in the surrounding air. These waves are only sound.

$\huge\tt{EXAMPLE:}$

→ Ring the school bell we will hear the sound of a bell.

→ while touching the ringing bell with our hand. we will feel the vibration in the bell.

→ If we hold the bell by hand, then the vibration in the bell stops quickly and the bell stops ringing, but if we do not hold the bell, the bell keeps vibrating for a long time and keeps ringing for a long time.

→ This proved that the sound of a bell is caused by its vibrations.

Answer 2

Answer:

In physics, 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.[1] Only acoustic waves that have frequencies lying between about 20 Hz and 20 kHz, the audio frequency range, elicit an auditory percept in humans. In air at atmospheric pressure, these represent sound waves with wavelengths of 17 meters (56 ft) to 1.7 centimetres (0.67 in). Sound waves above 20 kHz are known as ultrasound and are not audible to humans. Sound waves below 20 Hz are known as infrasound. Different animal species have varying hearing ranges.