In many manufacturing processes it is not possible to get rid of noise problems completely. There are many simple, low-cost measures that can be taken to reduce noise, for example, the proper maintenance of machinery, but it is often necessary to do more than that.
An obvious and frequently used means of fighting excessive noise exposure is the use of hearing protectors. These are worn throughout a plant or in restricted areas. Protectors come in a variety of forms and offer widely varying damping effects.
Suppliers of hearing protectors generally specify the damping effects in octave bands, making it easy to choose the correct devices once the dominant frequencies in the sound spectrum are known.