PDF Hazards of Noise Mine Safety and Health Administration
allowable limit. An exposure of 200% is twice the allowable limit (2 X ) and . corresponds to a continuous noise exposure of 95 dBA for 8 hours. A citation for excessive noise exposure is not issued until the exposure, as measured with a dosimeter, reaches 132%. The reason for this is that the noise dosimeter has a ±2 dBA (±32%) range of un