British Occupational Hygiene Society technical guideline. Guide for the design of hearing protectors for general industrial use. BOHS Technology Committee Working Party on Hearing Protectors.
D004430:Ear Protective Devices / Q000592:standards*; D006801:Humans; D009787:Occupational Medicine; D011482:Protective Devices / Q000592:standards*; D012952:Societies; D006113:United Kingdom