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Noise is defined as any unwanted sound emitted by production process equipment and/or work tools that, at a certain level, can cause hearing loss.
Noise measurement and control are carried out in a workplace where there is a noise hazard from the operation of work equipment. Noise sources in the workplace are continuous, intermittent, impulsive, and repetitive impulsive.
Noise, another significant physical hazard, can be controlled by various measures.
Noise can be reduced by installing equipment and systems that have been engineered, designed, and built to operate quietly; by enclosing or shielding noisy equipment; by making certain that equipment is in good repair and properly maintained with all worn or unbalanced parts replaced; by mounting noisy equipment on special mounts to reduce vibration; and by installing silencers, mufflers, or baffles.
Substituting quiet work methods for noisy ones is another significant way to reduce noise-for example, welding parts rather than riveting them. Also, treating floors, ceilings, and walls with acoustical material can reduce reflected or reverberant noise. In addition, erecting sound barriers at adjacent work stations around noisy operations will reduce worker exposure to noise generated at adjacent work stations.
Some of the instruments used are Sound Level Meter and Noise Dosimeter: