Why human cannot hear infra sound?
Anonymous:
Because th
Those waves unable to vibrate eardrum
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Infrasound, sometimes referred to as low-frequency sound, is sound that is lower in frequency than 20 Hz or cycles per second, the "normal" limit of human hearing. Hearing becomes gradually less sensitive as frequency decreases, so for humans to perceive infrasound, the sound pressure must be sufficiently high.
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Answer:
Because the frequency of infrasonic sounds, don't match up to the hearing frequency
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