Hearing loss has been identified as a significant problem in the mining industry. The purpose of this study was to obtain information on noise exposures, hearing levels, and the use of hearing protection among a cross-section of sand and gravel workers. We obtained data on work-shift noise exposures and assessed hearing levels by audiometric testing. Use of hearing protection on the job and noise exposures off the job were assessed by questionnaire.
Of individuals studied (n=304), 67 percent (n=204) had noise exposures greater than the NIOSH recommended exposure limit, while 18 percent (n=56) had exposures greater than the MSHA Permissible Exposure Limit. The largest proportion of overexposures occurred among truck drivers and heavy equipment operators. Of the individuals eligible for audiometric testing (n=290), 44 percent (N=129) had a documented hearing loss of greater than 25 decibels in at least one ear. Although 66 percent of subjects reported that they had been issued hearing protection, almost half of these stated that they never used hearing protection on the job.
These findings confirm that sand and gravel workers are occupationally exposed to significant levels of noise exposure and indicate that hearing loss is occurring in this population. Many workers expressed concern about hearing loss when they saw the results of their audiometric tests, and asked for information about hearing protection. Companies instituting hearing conservation programs can document any hearing loss present when employees are hired, and help employees avoid further hearing loss related to work exposures.
Learning Objectives: At the conclusion of the session, the participant in this session will be able to: 1. Identify occupations most susceptible to hearing loss and sources that typically generate hazardous noise levels in sand and gravel operations. 2. Recognize the need for “hands on” training on the proper need and use of hearing protection in sand and gravel operations. 3. Understand the components and content of a “sound” hearing conservation program that should be included as part of all worker training at sand and gravel operations.
Keywords: Hearing Protection, Occupational Surveillance
Presenting author's disclosure statement:
Organization/institution whose products or services will be discussed: None
I do not have any significant financial interest/arrangement or affiliation with any organization/institution whose products or services are being discussed in this session.