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Question

The sounds having frequency of 20 Hz to 20,000 Hz are

A
Ultrasound
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B
Infrasonics
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C
Hypersonics
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D
Audible Sounds
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Solution

The correct option is B Audible Sounds
In the case of sound waves, having frequency in between 20 Hz and 20,000 Hz, called audible sound and waves of frequency smaller than 20 Hz are called infrasonic and waves having frequency greater then 20,000 Hz, called Hypersonics sounds.

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