143
In animals, noise can have the following impact (FHWA 2018):
1. The risk of loss of life by changing predator or prey detection/avoidance
2. Interfere with reproduction besides navigation
3. Contribute to hearing loss
7.2 Engineering Control
Poor maintenance of machine can result in noise. Hence, regular maintenance by
providing lubrication, alignment, tightening vibratory parts can help in mitigating
noise. Further optimal loading of some machines can also reduce noise.
Where noise cannot be controlled by maintenance and operation, use of sound
insulation/barriers is advisable.
Insulation and barriers include the following:
1. Walls
2. Silencers
3. Machine enclosures
4. Trees/shrubs around noisy area
Wall can play a major role in controlling noise pollution within an industry by
restricting noisy machine within walls. Similarly, noise barriers are used adjacent to
roads to reduce noise levels (Fig. 7.1). Silencers are provided to automobile exhaust
Fig. 7.1 Highway noise barrier
7.2 Engineering Control
In animals, noise can have the following impact (FHWA 2018):
1. The risk of loss of life by changing predator or prey detection/avoidance
2. Interfere with reproduction besides navigation
3. Contribute to hearing loss
7.2 Engineering Control
Poor maintenance of machine can result in noise. Hence, regular maintenance by
providing lubrication, alignment, tightening vibratory parts can help in mitigating
noise. Further optimal loading of some machines can also reduce noise.
Where noise cannot be controlled by maintenance and operation, use of sound
insulation/barriers is advisable.
Insulation and barriers include the following:
1. Walls
2. Silencers
3. Machine enclosures
4. Trees/shrubs around noisy area
Wall can play a major role in controlling noise pollution within an industry by
restricting noisy machine within walls. Similarly, noise barriers are used adjacent to
roads to reduce noise levels (Fig. 7.1). Silencers are provided to automobile exhaust
Fig. 7.1 Highway noise barrier
7.2 Engineering Control