We live in a world of labels. We trust some labels to be precise: We expect a 250 mg capsule to deliver 250 milligrams of medication, and our 2-liter soft drink bottle undoubtedly holds two liters.

In the world of workplace health and safety, noise remains one of the most pervasive—and preventable—hazards. Hearing loss is the third most common chronic physical condition among U.S. adults, and an ...

Since the inception of hearing conservation regulations hatched in the 1970's, efforts to stop noise-induced hearing loss always have been tied to a lagging indicator – namely, audiometric testing. If ...

Or any other condition that may interfere with face piece seal. 9.0.1. The test subject shall be shown how to put on a respirator, proper positioning on the face, and how to set strap tension.