Question

What do you understand by noise pollution? Discuss different noise level and its harmful effect.

Answer 1

The disturbance caused by an undesirable loud sound of different kinds is called noise pollution.
harmful effects:
1: hearing loss 
2: fatigue due to lack of sleep
3:high blood pressure (hypertension)
4: anxiety

Answer 2

By definition, noise pollution takes place when there is either excessive amount of noise or an unpleasant sound that causes temporary disruption in the natural balance. This definition is usually applicable to sounds or noises that are unnatural in either their volume or their production. Our environment is such that it has become difficult to escape noise. Even electrical appliances at home have a constant hum or beeping sound. By and large, lack of urban planning increases the exposure to unwanted sounds. This is why understanding noise pollution is necessary to curb it in time.