Multiple choice

Which one of the following properties distinguish ultrasound from its normal audible sound?

  1. intensity

  2. speed of propagation

  3. frequency

  4. none of these

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

Ultrasound is defined by its frequency, which is above the range of human hearing (typically above 20,000 Hz). Audible sound falls within the 20 Hz to 20,000 Hz range.

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