title: Hearing conservation--a shipyard challenge.
mesh_terms: D001299:Audiometry; D004430:Ear Protective Devices; D006266:Health Education; D006311:Hearing Disorders / Q000209:etiology; D006801:Humans; D008452:Maximum Allowable Concentration; D009622:Noise / Q000009:adverse effects; D009784:Occupational Diseases / Q000209:etiology; D009786:Occupational Health Services; D009787:Occupational Medicine; D012767:Ships; D014481:United States