A particularly noisy process is operated by a single operator working at a control console.The 8-hr TWA exposure level for this operator is 96 dBA.The company has initiated an engineering project to alleviate the problem and has two plans:
Plan A - Move the operator's control console from its current position 5 feet from the source of the noise to a point 10 feet away.
Plan B - Enclose the noise source in an enclosure that would be effective in reducing the absolute sound pressure level of the noise by 75%.
What would be the new decibel exposure level if
a. Plan A were carried out
b. Plan B were carried out
c. Both Plan A and Plan B were carried out
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