Question

What is sound and how is it produced?

Answer 1

Sound is a form of energy which usually generates the sensation of hearing in ears. Sound is produced by to and from motion of an object.

Sound can be produced in various types :- 

1. By stricking : For example, if we strike a metal plate with a stainless steel spoon and touch the plate gently we can feel the vibration and also listen the sound.

2. By plucking : When we pluck the wires of a guitar, sitar or any other string instrument the wires vibrate and a sound is generated.

3. By blowing air : When we whistle through the mouth of play a flute the air column vibrates. Hence, a sound is produced.

4. By rubbing : When we rub our palm or drag a table on the floor a sound is produced.


Therefore, we observe that a sound is produced by a body only when it vibrates.

Answer 2

DEFINITION-

Sound is an energy which causes the sensation of hearing in our ears. sound is a mechanical energy and therefore require material medium for propagation. it cannot travel in vaccum.

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SOUND PRODUCTION-

sound is produced when a body vibrates and the vibration reaches our ears through the vibrations of particles of the surrounding air.  

when a source of sound vibrates it creates a periodic disturbance in the medium near it (i.e condition of the medium changes). this disturbance then travels in the medium forming waves.

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EXAMPLES-

1) a stretched string when plucked at one end produces sound.

2)a tuning fork when struck against a rubber pad produces sound energy.