Question

what is sound? Name its types​

Answer 1

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Sound is a longitudinal, mechanical wave. It is caused by the back and forth vibration of the particles of the medium through which the sound wave is moving. The vibrations of the object set particles in the surrounding medium in vibrational motion, causing the auditory receptors to detect them. This is called sound.

There are two types of sound, Audible and Inaudible.

• Inaudible sounds are sounds that the human ear cannot detect. The human ear hears frequencies between 20 Hz and 20 KHz.

• Sounds that are below 20 Hz frequency are called Infrasonic Sounds. Elephants use Infrasonic sounds to communicate with herds 100s of kms away.

• Sounds that are above 20 KHz frequency are called Ultrasonic Sounds. Dogs, Bats can hear high frequency sounds.

Answer 2

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★Sound:-

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.

★Types of spund:-

• audible,
• inaudible,
• unpleasant
• pleasant,
• soft,
• loud,
• noise
• music.

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