Noisy computer printers may be enclosed with hinged, insulated covers which contain the noise generated. Examples include acoustical ceiling tiles and acoustic wall panels. By doubling the distance from the worker to the noise source, the noise levels may be reduced to one fourth. It is important to remember that this practice will not work in an enclosed room because of the tendency of sound to be reflected off walls, ceilings, and other flat surfaces. They are a last resort because they often don't work well, are worn improperly, are uncomfortable and can cause ear infections.
Ear muffs are generally better than ear plugs.
They reduce the most noise, are least likely to cause ear infections and they require the least personalized fitting. Ear muffs can be worn with ear plugs to provide greater protection. However, ear plugs and ear muffs should be a last resort after other measures to reduce noise have been tried. OSHA also requires employers to provide training on the proper use of such equipment. Workers have a right to witness the monitoring and should make sure that the noise is measured where people actually work and not in some other part of the area.