What do you mean by Infrasonic?

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Sujoy Das

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Sound whose wave frequency is too low (under 15-20 hertz) to be heard by humans. Some animals, such as elephants and whales, emit calls at infrasound frequencies.when the frequency of sound is below the human audible range of sound which is (20-20000)hz it is called infrasonic
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Educator having 8 years of experience in Teaching industry and M.Sc., B.Ed., CTET qualified.

Sound whose wave frequency is too low (under 15-20 hertz) to be heard by humans. Some animals, such as elephants and whales, emit calls at infrasound frequencies.
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Relating to or denoting sound waves with a frequency below the lower limit of human audibility.
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when the frequency of sound is below the human audible range of sound which is (20-20000)hz it is called infrasonic
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