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  • Frequency of sound below 20 Hz is called
Multiple choice

Frequency of sound below 20 Hz is called

  1. sonar

  2. ultrasounds

  3. infrasonic sounds

  4. none of these

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

Sound waves with frequencies below the human audible range of 20 Hz are classified as infrasonic. Ultrasound refers to frequencies above 20,000 Hz.

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