Engineering, 05.05.2020 20:42 lovelife132015

10. A worker is currently exposed to two coexisting sources of noise during an 8-hour work shift, one at 85 dBA and the other at 87 dBA. The noise results from two turbines located near the worker. A proposal has been made to install a third turbine that will expose the worker to an additional noise source of 91 dBA, but only for two hours of the 8-hour shift. (a) Determine the noise dose of these three noise sources. (b) The noise level from the third turbine must be reduced to satisfy OSHA standards. To what dBA level must the noise level of the third turbine be reduced in order to satisfy OSHA noise dose requirements

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10. A worker is currently exposed to two coexisting sources of noise during an 8-hour work shift, on...