Retrofit Noise Control Modifications for an Underground Haulage Vehicle.
Ch in "Trends in Ergonomics/human Factors V" 1988 :541-548
This Bureau of Mines paper addresses noise exposure problems posed by diesel-powered haulage vehicles used in underground mining. Full- shift dosimeter surveys indicated that load-haul-dump (lhd) vehicle operators had noise exposures that ranged from 160 to 470 pct of the allowable. Retrofit treatments were installed on a typical lhd machine during two 3-day work periods. Three acoustical instrumentation systems indicated that the noise level at the operator's location was reduced by 4.5 to 5.2 Dba. These reductions will increase the permitted time of vehicle operation by 87 to 106 pct. The total cost for the abatement materials amounted to $325. This project indicated that low-cost modifications can be effective in reducing the noise generated by diesel-powered lhd vehicles.
Ch. in "Trends in Ergonomics/human Factors V" 1988, PP. 541-548