Physics
Grade-8
Easy

Question

If the audible sound frequency increases, then the sound becomes ______.

  1. Ultrasound
  2. Infra sound
  3. Audible sound
  4. None

hintHint:

Ultrasound has frequency more than 20kHz.

The correct answer is: Ultrasound


    • Audible range of frequency is 20Hz to 20kHz.
    • Sounds with frequencies more than 20kHz are called ultrasounds.
    • Therefore, if audible sound frequency increases, the sound becomes ultrasound.
    • So, the correct option is a.

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