Attenuation characteristics of recreational helmets.
D000328:Adult; D001309:Auditory Threshold; D001334:Automobile Driving; D004424:Ear Canal; D005069:Evaluation Studies as Topic; D005260:Female; D006257:Head; D006317:Hearing Loss, Noise-Induced / Q000517:prevention & control*; D006801:Humans; D008297:Male; D011312:Pressure; D011481:Protective Clothing / Q000592:standards*; D011482:Protective Devices / Q000592:standards*; D012865:Skiing; D013016:Sound