There are 4 fundamental ways by which noise can be controlled.
1. Reduce noise at the source
2. Block path of the noise
3. Increase the path length
4. Protect the recipient
1. Reduce the noise at the source
Noise can be reduced by effectively muffing the vehicles and machines with sound absorbing materials.
In industries noise reduction can be done by
i) Using rigid sealed enclosures around the machine lined with sound absorbing materials
ii) Isolate the machines and their enclosures from the floor using special shock absorbing mounts and pads.
iii) Use flexible couplings in joints.
vi) Regular and thorough maintenance of machineries and vehicles.
2. Block the path of the noise
Isolate the source of noise from the recipients by blocking the path by sound proof material.
3. Increase the path length
i) Locate noisy compressors, generators and other equipment away from work sites.
ii) Establish schools and hospitals away from traffic areas, airports and industries.
4. Protect the recipient
The use of earmuffs can protect the individuals from excessive noise level
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