Question

difference between infrasonic and ultrasonic sounds
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Answer 1

Answer:

Sound is only audible to the average human ear if the frequencies lie between 20Hz and 20kHz. The actual range varies from person to person. Sound waves with frequencies less than 20Hz are called infrasonic or subsonic and those with frequencies above 20kHz are called ultrasonic.

Answer 2

Answer:

infrasound

sounds which aren't audible or very less audible. it is of 0 to 20 Hertz

ultrasound

sounds which is very high but not audible for human range . it is of more than 20000 hertz.

it is used in medical care such as ultrasound