Chronic effects noise

For example rock drilling—up to 115 dBA chain saw—up to 125 dBA abrasive blasting—105 to 112 dBA heavy equipment operation—95 to 110 dBA demolition—up to 117 dBA and needle guns—up to 112 dBA. Exposure to 115 dBA is permitted for a maximum of 15 minutes for an eight-hour workday. No exposure above 115 dBA is permitted. Traditional dosimetric measurement may substantially underestimate noise exposure levels for construction workers since shortterm peak exposures, which may be responsible for acute and chronic effects, can be lost in lower, full-shifttime-weighted average measurements. 

Foo SC, Lwin S, Chia SE, et al. 1994. Chronic neurobehavioral effects in paint formulators exposed to solvents and noise. Armais Academy of Medicine 23 650-654. 

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