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Question

The sounds that cannot be heard by humans are

A
inaudible sounds
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B
infrasounds
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C
ultra sounds
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D
all of the above
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Solution

The correct option is D all of the above
Humans can hear sounds having frequencies between the range of 20 Hz and 20,000 Hz. The sounds above and below this range are inaudible to humans. The sounds below the range of 20 Hz are called infrasounds and the sounds above the range of 20,000 Hz are called ultrasounds. Both are inaudible to humans.

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