Fit-testing hearing protectors: an idea whose time has come.

The performance of hearing protection devices (HPD) worn by individual workers in specific noise-exposure environments has been difficult to assess using the hearing protector ratings printed on HPD packages. Because the role of the HPD in prevention of hearing loss remains as a vital last line of defense against the effects of noise exposure, proper assessment of their performance is increasingly critical. HPD fit-testing procedures now allow the individual fit-testing of HPD to assist in appropriate selection of HPD for individual workers, to aid in training workers on proper use of HPDs, and a range of other applications. Understanding these technologies, their strengths and weaknesses, and appropriate application of the results of fit-testing may enable employers to make improvements in their hearing loss prevention program performance.