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what is sound and how it is produced

Sound is a vibration in an elastic medium (eg air) at a frequency which can be heard by human ear. Sound is propagated through an elastic medium as a longitudinal wave.

Sound waves are longitudinal waves produced by variations in air pressure. A vibrating source pushes molecules in air back and forth, creating areas of compression and rarefaction. When a molecule moves, it collides with the next one and makes it move too. The energy of a sound wave travels away from the source trough a series of molecule collisions parallel to the direction of the wave.

When an object vibrates it makes the air particles around it vibrate as well and our ear drums sense this vibration and turn it into electric signals that our brain can understand. This is how we hear sound. The number of vibrations per second determines the pitch of the sound.

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 Sound is vibration that travels through a medium like air, water, solid and can be heard when they reach the reciever (i.e. persoon's ear or animal's ear). 

When sound vibrations move they push the particles and vibration is passed through the particles and sound is produced. In short sound is produced through vibrations. 

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 sound is produced by vibrations and it moves by elasticity of the atoms and thats the reason why sound travels the fastest in solids as the space between 2 particles is very less and in air it travels comparitivly slow as the space between the atoms is comparitivly more

or we can simply say sound is produced or is a result of vibrations

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it is produced by vibration.

for ex. while speaking touch your neck. u will observe vibration.

thumbs up please.

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