What are the main sources of noise pollution?

What are the main sources of noise pollution?
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1 Answer

Answer :

a) Gadgets used in home like mixer and grinder.

b) Transport vehicles like aircrafts

c) Commercial and industrial activities,

d) Audio equipment used in social and public functions.
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The unit of noise pollution (level) is – (1) decibel (2) decimal (3) ppm (4) None of these

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