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employees and required the appliance for sure circumstances of a safety issue of 50# to the NRR, above and beyond the 7 dB subtraction known as for when using A-weighted measurements. For instance, contemplate a employee who’s uncovered to 98 dBA for 8 hours and whose listening to protectors have an NRR of 25 dB. We can estimate the worker’s resultant publicity utilizing the 50# safety factor. The employee’s resultant publicity is 89 dBA in this case. Overall, in mixed exposure to noise and natural solvents, interactive effects may be

 

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