Unprotected exposure

A worker’s exposure to noise, measured at the worker’s ear position, which does not take into account any protection afforded by person hearing protectors (NOHSC 1007). The correct notation for unprotected exposure is LAeq,8h. Note: Measurement at the worker’s “ear position” means a measurement taken at a horizontal distance of approximately 10cm to no more than 20cm from the entrance of the external canal of the ear receiving the higher noise level.

Source: NOPSEMA Guidance Note: Noise Management—Principles of Assessment and Control, N-09000-GN0401, Australia, Revision 3, December 2011. Regulatory Guidance


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