What are infrasonic and ultrasonic sound waves?

Ultrasonic and Infrasonic sound waves are waves that are not audible to human beings. The audible region contains sound waves of 16 Hz to 20,000 Hz.

Infrasonic sound waves have frequencies below 16 Hz. For example, an earthquake.

Ultrasonic sound waves have frequencies above 20,000 Hz. For example, x-rays.

Grade 11 Physics