Correct Answer (Detailed Explanation is Below)
B.
20 Hz to 20,000 Hz
Detailed Explanation
The normal human audible frequency range is approximately 20 Hz to 20,000 Hz (20 kHz). Sounds below 20 Hz are called
infrasonic sounds, while sounds above 20 kHz are called
ultrasonic sounds. Human hearing sensitivity varies with age and individual conditions. This frequency classification is important in physics, acoustics, medical ultrasound and communication technology.