Determine job hazards, then invest in protection.
D004430:Ear Protective Devices; D004781:Environmental Exposure; D006077:Government Agencies; D006801:Humans; D009787:Occupational Medicine; D011481:Protective Clothing; D011482:Protective Devices; D012134:Respiratory Protective Devices; D012926:Social Control, Formal; D014481:United States