Which of the following frequency of sound can’t be heard by human beings?

40 Hz

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400 Hz

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4000 Hz

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40,000 Hz

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Solution

The correct option is D
40,000 Hz

Explanation:
The range of audible frequencies that a human being can hear is known as the range of hearing. The healthy young person can sense or hear the frequency of 20 to 20000 Hertz.
The frequency that is most sensitive to our ear is 2000 Hz to 3000 Hz.
Therefore, 40,000 Hz doesn't come under the audible range of frequencies of a normal person.
Hence, option (d) is correct.

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