Question

What name is given to the sound waves of frequency too high for human beings to hear?

Answer 1

Ultrasonic waves -

1. The sound waves of frequency greater than 20 kHz are called ultrasonic waves. These sound waves are not audible to the human ear. The term sonic applies to ultrasound waves of very high amplitude.
2. Animals like dolphins and bats rely on ultrasound waves to live. Bats make sounds that have the frequency of ultrasound. These sounds get transmitted and the bat receives its echo.
3. From the time interval between the transmitted sound and the echo received, as well as the angle of the echo received, they can find the distance of the target. Similarly, dolphins use ultrasound to understand the surrounding conditions and communicate with their peers.