Question

Define ultra and infrasonic sounds | Class 8 |

Answer 1

ultrasonic sound refers to the sound whose frequency is more than 20000 Hz (maximum hearing frequency of our ear)
infrasonic sound refers to the sound whose frequency is less than minimum hearing frequency of our ear.

I hope it will help you.

Answer 2

(Class 8 Answer)

$\huge {\green {\sf {\underline {\underline{Answer}}}:-}}$

The sound (inaudible for humans) having frequency less than 20 Hz are known as infrasonic sounds.

Examples: Rhinoceros, Whales and elephants.

The sounds (inaudible for humans) having frequency more than 20,000 Hz are known as ultrasonic sounds.

Examples: Dolphins, bats, porpoises and dogs.

$\large\color{darkgreen}{I \: hope \: this \: answer \: will \: be \: helpful.}$

$\huge\dag\sf\blue{By \: Divyanshu}$