Multiple choice general knowledge sports

infrasonic sound (infrasound) is ___ .

  1. less than 20 Hz

  2. equal to 20 Hz

  3. more than 20 Hz

  4. upper limit of human hearing

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Infrasonic sound refers to sound waves with frequencies below 20 Hz, which is below the lower limit of human hearing. While humans cannot hear infrasound, it can still be felt as vibrations or pressure changes. Some animals like elephants and whales can use infrasound for communication over long distances.