title: [Noise reduction through individual hearing protective devices made in the German Democratic Republic].
mesh_terms: D001309:Auditory Threshold; D004430:Ear Protective Devices; D005859:Germany, East; D006801:Humans; D009622:Noise; D011482:Protective Devices
vernacular_title: Schalldämmung der in der DDR gefertigten individuellen Gehörschutzmittel