Multiple choice

The sound waves with frequency higher than 20000 Hz are called ____________________.

  1. ultrasonic

  2. supersonic

  3. infrasonic

  4. none of these

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

Our ears are most sensitive to sounds in the frequency range of 3000 Hz - 4000 Hz. Almost nobody hears sounds outside the range of 20 Hz - 20000 Hz.  Sound waves with frequencies less than 20 Hz are called infrasonic waves and sound waves with frequencies higher than 20000 Hz are called ultrasonic waves.