Question

loudness of sound is painful above

Answer 1

Our normal hearing capacity is 20Hz to 20KHz. So, hearing above 20KHz may be painful

Answer 2

Unpleasant sounds that we hear is known as noise. Continuous exposure to noise will cause hearing damages to the ear. Some harmful effects of noise are listed below
1. Increases irritation and stress
2. Very disturbancing to humans
3. Loss of sleep.

I hope this helped