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The frequency of ultrasound waves is
less than 20 Hz
between 20 Hz and 2 kHz
between 2 kHz and 20 kHz
greater than 20 kHz
Ultrasonic waves are sound waves transmitted above the human-detectable frequency range, usually above 20,000 Hz. They are used by some animals and in medical or industrial technological devices.
By: Munesh Kumari ProfileResourcesReport error
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