Documenting hearing conservation tests equipment's effectiveness.
D001301:Audiometry, Pure-Tone; D001305:Auditory Fatigue; D004430:Ear Protective Devices; D006317:Hearing Loss, Noise-Induced / Q000517:prevention & control*; D006801:Humans; D008875:Middle Aged; D009784:Occupational Diseases / Q000517:prevention & control*; D011482:Protective Devices