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Sound — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceSound1 Mark
MCQ
Which one has higher frequency?
  • A
    Infrasonic sound
  • B
    Ultrasonic sound
  • C
    Audible sound
  • D
    All of the above have same frequency
✓

Answer

  1. Ultrasonic sound

Explanation:

Audible sound has a frequency range of 20Hz to 20 kHz.

Infrasonic frequency is below audible range, i.e. below 20Hz.

Ultrasonic frequency is above audible range, i.e. above 20KHz. 

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