Physics
Grade-6
Easy

Question

Sounds of 15 Hz frequency are called _______.

  1. Ultrasound 
  2. Infrasound
  3. Audible sound
  4. None of these

hintHint:

The audible frequency range for human ear is from 20Hz to 20000Hz

The correct answer is: Infrasound


    • The audible frequency range for human ear is from 20Hz to 20000Hz , waves having frequency above 20000Hz , are called ultrasonic and below 20Hz , they are called infrasonic .

    • Sounds of 15 Hz frequency are called _Infrasound

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