Know when workers must wear hearing protection
OSHA’s standard at Section 1926.52, Occupational Noise Exposure, says that workers must be provided with a hearing protection device (HPD) when exposed to an 8-hour time-weighted average of 90 decibels or greater. For example, an exposure of 94 dBA as an 8-hour TWA would mean that hearing protectors must be available and at no cost, and the worker must wear the hearing protectors.
Workers are required to wear hearing protectors if workers’ exposure meets or exceeds the permissible noise exposures in Table D-2 under 1926.52(d)(1) (e.g., the worker is exposed at or above 90 dBA as an 8-hour TWA). The talk test is often mistakenly used on jobsites to determine if workers need hearing protection. Workers are often told at jobsites that they should use hearing protection if they can’t hear another worker standing near them. Workers might use this as a quick test to see if hearing protection is needed but perform a formal noise assessment on the jobsite to determine if they have exposure to noise above the permissible limit.
The National Institute for Occupational Safety and Health (NIOSH) recommends that workers wear HPDs at 85 dBA and above, regardless of the exposure time. NIOSH also recommends an 85 dBA 8-hour TWA recommended exposure limit (REL). This information is available in the NIOSH Criteria for a Recommended Standard: Occupational Noise Exposure.
There is nothing in OSHA’s standard that would prohibit an employer from having a policy on the jobsite that is more stringent than the OSHA standard.