NIOSH received a request for an evaluation from a highway patrol concerned about troopers' noise exposures during patrol. Dosimeter measurements were made on troopers in six different counties over three days. Real-time spectral data were collected from locations along the highways. The noise measurements were well below the OSHA PEL and action level. Only four of 53 samples exceeded the NIOSH REL. Noise measured along the freeway ranged up to 88 dBA. Recommendations on implementation of a hearing conservation program and the use of specialized hearing protection devices have been presented to the highway patrol.
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