Question

Sound of frequency lower than 20 Hz is called the _______ *

Answer 1

infrasound..........

Answer 2

Sound of frequency lower than 20 Hz is called infrasonic sounds.

• The audible frequency range at which humans can hear sound waves is 20 Hz - 20kHz
• Sound waves of frequency below 20 Hz cannot be heard by humans and are called infrasonic sound waves.
• Such low-frequency sounds can be heard by animals with extremely sensitive ears, for example, Rhinocerous.
• Sound waves of frequency > 20kHz are called ultrasonic sounds inaudible to humans, emitted and heard by animals like beetles, moths, dolphins, bats, etc.