Question

Distinguish between infrasonic and ultrasonic.

Answer 1

Infrasonic sounds: The sounds of frequency less than 20Hz are called infrasonic sounds. The infrasonic sounds have frequency below the lower limit of human hearing.

Example: Sound produced by earthquakes, thunder, volcanoes are in the Infrasonic range. The human Ear cant hear this sound but elephants and whales can hear this.

Ultrasonic sounds: The sound of frequency more than 20,000Hz are called ultrasonics. Ultrasonic sounds have a frequency above the upper limit of human hearing.

Example: The audible range of dogs, cats, moths and mice extends into ultrasound frequencies. They can hear very high frequencies that humans cannot.