(i) Control the Source of Noise: The machines producing noise should be segregated and enclosed in a sound proof room. The parts of the machine which produce unwanted sound should be properly oiled, grossed, repaired or replaced.
(ii) Sound absorbers should be installed in the industries.
(iii) Workers working in the factories producing more than 100 dB noises must be provided with ear plugs etc. Periodic examination of workers exposed to noise must be carried out.
(iv) ‘No horn’ or ‘silent’ zones near hospitals, schools etc. should be demarcated and offenders should be fined.
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(v) The use of loud-speakers and address systems should be totally banned from 9 p.m. to 6 a.m.
(vi) Heavy vehicular traffic in residential areas should not be allowed.
(vii) Use of pressure horns should be banned.
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(viii) Coolers and other electrical appliances should be noiseless.
(ix) T.V., radio etc. should be played at slow volume which is tolerable to everybody in the house and neighborhood.
(x) Noise pollution by the vehicles should be checked by suitable adjustments and by fitting noise absorbing devices.
(xi) Automobile workshops should be away from the residential areas.
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(xii) Green vegetation and plants should be grown. They help to reduce noise by 8 to 10 decibels.
(xiii) Legal measures should be enforced to check noise pollution.
(xiv) Public should be educated about the hazzards of noise and measures to reduce it as far as they can. Their active co-operation is also essential in controlling the noise pollution.
Now a days a number of very sophisticated instruments are available which not only check the noise level but they also measure the loudness, frequency and duration of noise. Such instruments are very useful in factories and other places where noise is a problem.