Out of sound is out of sight: hearing protection falls short.
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D004430:Ear Protective Devices; D006317:Hearing Loss, Noise-Induced / Q000209:etiology / Q000517:prevention & control*; D006801:Humans; D009622:Noise / Q000517:prevention & control*; D009623:Noise, Occupational / Q000009:adverse effects / Q000517:prevention & control*; D014481:United States; D014489:United States Occupational Safety and Health Administration