Question

Infrasonic waves and ultrasonic waves are cannot hear human beings why?
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Answer 1

Explanation:

Infrasonic referred to low frequency sound less than 20 Hz(which is our normal limit of hearing) so we cannot hear.

Ultrasonic is nothing but sound wave with frequency higher than the upper audible limit of human hearing so we cannot hear the ultrasonic sound.

Thank you.

Answer 2

Answer:

Infrasound is too low-pitched for humans to hear. Sounds with frequencies above 20,000 hertz are called ultrasound. ... The whistles produce sounds with frequencies too high for the human ear to detect. Other animals can hear even higher-frequency sounds.