What is the intensity of noise as indicated by a sound level meter?

What is earplugs, earcaps, or earmuffs worn alone?

What is an instrument that measures sound levels?

What is earplug and earmuff worn together?

What is an audiologist, otolaryngologist, or other qualified physician who has experience and training in evaluating occupational audiograms?

What is a hearing level change that has become persistent and is not expected to improve?

What is a chart, graph, or table resulting from an audiometric test showing an individual's hearing threshold levels as a function of frequency?