High level noise is a disturbance to the human environment.
Because of urbanization, noise in all areas in a city has increased considerably.
One of the most pervasive sources of noise in our environment today is those associated with transportation.
People reside adjacent to highways, are subjected to high level of noise produced by trucks and vehicles pass on the highways.
Prolonged exposure to high level of noise is very much harmful to the health of mankind.
In industry and in mines the main sources of noise pollution are blasting,movement of heavy earth moving machines, drilling, crusher and coal handling plants etc.
The critical value for the development of hearing problems is at 80 decibels
.
Chronic exposure to noise may cause noise-induced hearing loss.High noise levels can contribute to cardiovascular effects.
Moreover, noise can be a causal factor in workplace accidents.
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