Correct Answer:
A. 20 Hz to 20,000 Hz
The human auditory system is structurally tuned to detect specific frequencies of sound waves vibrating through the air.
- The normal hearing range for a healthy young human being is universally recognized as 20 Hz to 20,000 Hz (or 20 kHz).
- Sound frequencies falling below 20 Hz are classified as infrasound, while frequencies climbing above 20,000 Hz are known as ultrasound, both of which are completely imperceptible to the average human ear.