Sound corresponding to which frequency is/are ultrasonic sound?

30Hz

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30,000Hz

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3,000Hz

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3,00,000Hz

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Solution

The correct options are
B 30,000Hz
D 3,00,000Hz
Ultrasonic Sound: The term "ultrasonic" applied to sound refers to anything above the frequencies of audible sound, and nominally includes anything over 20,000 Hz. So the correct answer is 30,000 Hz and 3,00,00Hz which are the options greater than 20,000 Hz.

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