Sound waves with frequency smaller than 20 Hz are called:

ultrasound

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infrasound

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nanosound

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minisound

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Solution

The correct options are
B
infrasound

C
nanosound

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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Similar questions

No.	Column 1	Column 2	Column 3
1.	Transverse wave	(a) Particles oscillate parallel to direction of propagation	(i) Waves produced in slinky.
2.	Longitudinal waves.	(b) Particles oscillate perpendicular to direction of propagation	(ii) Frequency less than 20 Hz.
3.	Ultrasound.	(c) Echo formation is heard under particular conditions.	(iii) Waves produced in string
4.	Infrasound	(d) High frequency waves.	(iv) Frequency between 20 Hz and 20000 Hz.
5.	Audible frequency	(e) Low frequency waves	(v) Frequency greater than 20000 Hz.

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