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REL - Noise Recommended Exposure Limit

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

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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.

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