This criteria document reevaluates and reaffirms the recommended exposure limit (REL) for occupational noise exposure established by the National Institute for Occupational Safety and Health (NIOSH) in 1972. The REL is 85 decibels, A-weighted, as an 8-hr time-weighted average (85 dBA as an 8- hr TWA). Exposures at or above this level are hazardous. The recommendations in this document go beyond attempts to conserve hearing by focusing on prevention of occupational NIHL. For workers whose noise exposures equal or exceed 85 dBA, NIOSH recommends a hearing loss prevention program (HLPP) that includes exposure assessment, engineering and administrative controls, proper use of hearing protectors, audiometric evaluation, education and motivation, recordkeeping, and program audits and evaluations.
NIOSH-Criteria-Document; Occupational-noise; Noise-levels; Noise-exposure; Maximum-permissible-exposure; Standards; Occupational-exposure; Noise-intensity; Work-environments; Peak-values; Noise-induced-hearing-loss; Audiometry; Prevention; Protection-equipment; Record-keeping; Information-dissemination; Occupational-safety-and-health; Construction-Search