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Byju's Answer
Standard IX
Physics
Frequency
Sound waves w...
Question

Sound waves with frequency smaller than 20 Hz are called:

A
ultrasound
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B
infrasound
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C
nanosound
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D
minisound
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Solution

The correct option is B infrasound
Sound waves with a frequency smaller than 20 Hz are called infrasound. Rhinoceroses communicate using infrasound of frequency as low as 5 Hz.

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