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Noise - Recommended Exposure Limits (REL)

The NIOSH noise Recommended Exposure Limit - REL - for occupational noise

The National Institute for Occupational Safety - NIOSH - Recommended Exposure Limit - REL - for occupational noise exposure is

85 decibels, A-weighted, as an 8-hr Time-Weighted Average -TWA - (85 dBA as an 8-hr TWA)

Note! Exposures at and above this level are considered hazardous.

Exposure to continuous, varying, intermittent, or impulsive noise shall never exceed 140 dBA.

Sound pressure filters that compensates for the hearing sensed by the human ear.

Maximum daily noise dose level when exposed to periods with different levels.

Exposure to noise should be controlled so that it is less than a maximum combination of exposure level and duration.

The EPA Equivalent Sound Level - Leq - quantifies the noise environment to a single value of sound level for any desired duration.

OSHA maximum A-weighted sound pressure levels allowed per day.