Question

what are the infrasonic and ultrasonic wave??

Answer 1

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

Ultrasonic waves are acoustic waves that are so high in frequency that humans can’t hear them; however, infrasonic waves are sound waves that are lower in frequency than what humans can hear. A subsonic wave is a wave that is traveling slower than the speed of sound and a supersonic waves travels faster.