Physics
Grade-8
Easy
Question
Sound with high frequency is called as ________.
- Infra
- Ultra
- Audible
- None
Hint:
Audible range for an average human ear is 20Hz to 20kHz.
The correct answer is: Ultra
- Sounds with frequencies more than 20kHz are called ultrasounds.
- These are high frequency sound.
- So, the correct option is b.
Sounds with frequencies less than 20Hz are called infrasound.
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