Question: 6. A worker is currently exposed to two coexisting sources of noise during an 8-hour work shift, one at 83 dBA and the other at

6. A worker is currently exposed to two

6. A worker is currently exposed to two coexisting sources of noise during an 8-hour work shift, one at 83 dBA and the other at 86 dBA. The noise results from two production machines that are near the worker. Management wants to install a third production machine that will expose the worker to an additional noise source of 92 dBA. Determine (a) the noise dose of these three sources and (b) the time weighted average (TWA) sound level. (c) Management realizes that the third noise source (from the third machine) must be reduced to satisfy OSHA standards. Determine to what dBA level must the noise level of the third machine be reduced in order to satisfy OSHA noise dose requirements? (d) What are some steps that management might take to reduce the noise exposure level of the worker if the third machine is installed? Name three. (30pt)

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