Question

What is the audible range of the average human ear?

Answer 1

1. Sound waves below the frequency of $20Hz$, are called infrasonic waves. They cannot be heard by the human ear,
2. Sound waves of the frequency between $20Hz\text{to}20,000Hz$ is the audible range. Humans ears can perceive sound waves of this range of frequency normally.
3. Sound waves above the frequency of $20,000Hz$ are called ultrasonic frequency.

Hence, the audible range of the average human ear is $20Hz\text{to}20,000Hz$.