Sound having a frequency greater than 20,000 Hz is called

Options

  • A. Infrasonic sound
  • B. Audible sound
  • C. Ultrasonic sound
  • D. More than one of the above
  • E. None of the above

Correct Answer (Detailed Explanation is Below)

C. Ultrasonic sound

Detailed Explanation

Ultrasonic sound has a frequency greater than 20,000 Hz, which is generally beyond normal human hearing. Ultrasound is widely used in medical imaging, SONAR, industrial testing and cleaning devices. In contrast, infrasonic waves have frequencies below 20 Hz. Both are mechanical waves and generally require a material medium for propagation.