Question

The frequency which is not audible to human ear is :

• A. $20Hz$
• B. $2500Hz$
• C. $20000Hz$
• D. $25000Hz$

Answer 1

The correct option is D

$25000Hz$

1. In humans, the range of hearing is about $20Hz$to$20KHz$.
2. Children under the age of five and some animals, such as dogs can hear up to$25KHz$.
3. At an older age, the ears become less sensitive to higher frequencies.
4. The frequency of $25000Hz$ which is not audible to the human ear.

Hence, option D is correct.