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Q.

Sound having frequencies above 20000 Hz is called ____________.

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a

infrasound

b

mega sound

c

micro sound

d

ultrasound

answer is B.

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Detailed Solution

Sound having frequencies above 20000 Hz is called ultrasound.

The audible frequency range for the human ear is from 20Hz to 20000Hz, waves having a frequency above 20000Hz, are called ultrasonic and below 20Hz, they are called infrasonic 

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