Question

what are ultrasonic sound name two animals that produce ultrasonic sounds

Answer 1

The sounds of frequency greater than 20000 Hz are called Ultrasonic sounds.

Eg of Animals who produce it. Whales, bats , dolphins etc.

Answer 2

Ultrasonic sound is a sound wave with frequency higher than the upper audible limit of the human hearing.

It is not different from normal sound in it's physical properties.

Ex. 1 A dog whistle which is not heard by human.

2 Detection of ships and object underwater.