TM5-3810-305-10DecibelLevelChartExposing the unprotected human ear to soundlevels above 85 dB (measured on the “A” scale)for prolonged periods can result in permanenthearing loss.Within the 85-dB envelope, hearing protection isIn order to avoid hearing loss, ear plugs orrequired. Failure to follow this procedure couldother suitable protective devices should be worncause SERIOUS INJURY.when working within the 85 dBA envelope (40 ftmaximum from the nearest surface of the crane)N O TEas shown on Figure 1-3.Sound levels in the operators cab can reach 87Radius dimensions illustrated in Decibel LeveldBA with the cab closed and therefore operatorsChart are from center of rotation. Points on theshould wear hearing protection while operatingprofile are from nearest surface of the crane.the LRT 110 Crane.1-10Figure 1-3. Decibel Level Chart - 85 - dB Profile
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