Question: According to the Hearing Standard ( excluding exceptions ) HPD ' s must attenuate the SPL to below or equal to: TWA of 9 0

According to the Hearing Standard (excluding exceptions) HPD's must attenuate the SPL to below or equal to:
TWA of 90 dBA
TWA of 85 dBA
TWA of 80 dBA
There is no established level
None of these
According to the Hearing Standard ( excluding

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