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Physics · May / June 2023 · Paper 12 · Question 23

5054Sound

Ultrasound is a type of sound wave that is not audible to a healthy human ear. Which range of frequencies contains only ultrasound?

  1. A30 Hz–3.0 kHz
  2. B300 Hz–30 kHz
  3. C3.0 kHz–3.0 MHz
  4. D30 kHz–30 MHz

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Correct answer: D. 30 kHz–30 MHz

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