Correct Answer:
B. 20 Hz – 20 kHz
Correct answer: 20 Hz – 20 kHz. A normal human ear can hear sounds from about 20 Hz to 20,000 Hz (20 kHz).
Background: Sounds below 20 Hz are infrasound, and above 20 kHz are ultrasound.
- 10 Hz – 10 kHz: 10 Hz–10 kHz is not the normal range.
- 30 Hz – 30 kHz: 30 Hz–30 kHz is not the normal range.
- 40 Hz – 40 kHz: 40 Hz–40 kHz is not the normal range.
Did you know? Dogs can hear much higher sounds than humans.
Memory trick: 20 to 20k.