science
Grade6
Easy
Question
Human ear can hear __________.
- Ultrasound
- Infrasound
- Audible sound
- None
Hint:
Frequencies above 20,000 Hz are referred to as ultrasonic.
The correct answer is: Audible sound
- The human ear responds to frequencies in the range of 20 Hz to 20,000 Hz.
- This range is audible to the human ear.
- Frequencies above 20,000 Hz are referred to as ultrasonic.
- Frequencies below 20Hz are referred to as infrasonic.
- Ultrasonic and infrasonic frequencies are outside the range of human perception.
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