Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

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.

3D Engineering ToolBox - draw and model technical applications! 2D Engineering ToolBox - create and share online diagram drawing templates! Engineering ToolBox Apps - mobile online and offline engineering applications!

Unit Converter


















































6.27.14

.