Question

what are ultrasonic and infrasonic sounds​

Answer 1

Answer:

Sound waves with frequencies less than 20Hz are called infrasonic or subsonic and those with frequencies above 20kHz are called ultrasonic. ... They do this by "speaking" and hearing with infrasonic waves which we cannot hear but can bend around obstacles rather than being absorbed like normal sound.

Answer 2

Answer:

Sound waves with frequencies less than 20Hz are called infrasonic or subsonic and those with frequencies above 20kHz are called ultrasonic. ... They do this by "speaking" and hearing with infrasonic waves which we cannot hear but can bend around obstacles rather than being absorbed like normal sound.