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Q.

Sound waves having a frequency of more than 20,000 Hz are called:

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a

Sonic Sound

b

Audible range

c

Infrasonic sound

d

Ultrasonic sound

answer is B.

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Detailed Solution

Sound waves having a frequency of more than 20,000 Hz are called ultrasonic sounds. The sound wave of frequency less than 20Hz is called infrasonic sound. 

The human ear can identify frequencies between 20 Hz and 20 kHz. 

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