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... on Occupational Noise because this topic had been neglected for many years. My research showed that the same PEL that I taught in 1979 to Oregon's Safety Compliance Officers was still in effect in 2009, thirty years later. But the state of the science for occupational noise exposure had changed. These changes...

... noise-induced hearing loss us government otolaryngology protection earplug hearing protector hearing protection noise-exposed worker indicator progression hearing loss safety manager noise exposure employer audiometric testing hearing conservation program knowledge management health...