Ear protectors vs. intense impact noise.
D000293:Adolescent; D000328:Adult; D000368:Aged; D004430:Ear Protective Devices; D005260:Female; D006320:Hearing Tests; D006801:Humans; D008297:Male; D008875:Middle Aged; D009622:Noise / Q000517:prevention & control*; D009623:Noise, Occupational / Q000009:adverse effects / Q000517:prevention & control*; D011482:Protective Devices