The following table shall be used to determine the permissible level of impact noise. This fact is based on low employee acceptable and improper used of personal protective equipment. It may be necessary to use several control methods in combination to assure workers' health. Hearing protectors may be used to prevent noise exposure while engineering or administrative controls are being developed. The following controls are arranged in descending order, with the first being the preferred method of control.
Engineering controls are the best choice, when feasible, for dealing with an occupational hazard.
The first control to consider regarding a noise sources elimination of the source. Can the source be enclosed, shielded, provided with a muffler or sound proofing, or provided with damping material. The second control method is known as administrative controls, which are also known as work practices. Examples of this control method involves rotation of workers, providing greater distance between the worker and the noise source, using less power or pressure to accomplish the task. The third control method is personal protective equipment which is also known as hearing protectors.