Q. Find out the methods to minimise sound pollution in town
Solution:
? The unit of sound level is decibel (db) . This can be measured by an instrument called decibel meter.
? Sound higher than 120 db are painful to the ear.
? The permissible sound limit in various occasions
? Silence zone in daytime = 50db, Night= 40 db
? Residential areas Daytime- 55 db Night time- 45 db
?Commercial area Daytime- 65 db Night time- 55db
? Industrial area Day time -75db Night time -70 db
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