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Q.

Among the following what is the frequency of subsonic sound?

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a

More than 20000 Hz

b

Less than 20 Hz

c

100 Hz

d

More than 20 Hz

answer is C.

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Detailed Solution

The frequency range of subsonic sound is less than 20 Hz. This cannot be sensed by the human ear. They are also known as infrasonic vibrations. 

Humans can only sense sounds of range 20 Hz - 20,000 Hz.

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