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Measures may include the isolation and damping of vibration sources; the replacement of components with quieter parts and material; the enclosure of particularly noisy components; the provision of noise barriers, etc.
For example, use barriers, remote controls or sound-proof covers. Reduce exposure levels. For example, restrict access to noisy areas, provide quiet areas for rest breaks, or limit time spent in noisy areas by rotating tasks. Proper maintenance of equipment and tools can result in lower noise levels.
The permissible noise level in India: In industrial areas, the permissible limit is 75 dB for daytime and 70 dB at night. In commercial areas, it is 65 dB and 55 dB, while in residential areas it is 55 dB and 45 dB during daytime and night respectively.
The interior standard is 45dB. The "Normally Unacceptable" noise zone includes community noise levels from above 65 decibels to 75 decibels.
The most common options are silencers, either reactive or dissipative; plenum chambers; acoustic coatings; enclosures; noise barriers; vibration dumping or insulation.
Using barriers, maintaining equipment, and moving noisy equipment far as feasible are some noise control strategies.
Noise abatement procedures are voluntary and designed to minimize exposure of residential areas to aircraft noise, while ensuring safety of flight operations. There are communities surrounding the airport which are noise sensitive. We want to minimize the noise impacts on these communities.
Noise reduction ratings are measured using the decibel, a standard unit of measurement used to describe how powerful or compressed a specific sound level is. Screenings are typically conducted in controlled laboratory experiments during which devices are tested in order to determine real-world capabilities.