Ear plug article failed the test.
Berger
Elliott H
EH
D004430:Ear Protective Devices / Q000145:classification*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006317:Hearing Loss, Noise-Induced / Q000517:prevention & control*; D006801:Humans; D009623:Noise, Occupational / Q000517:prevention & control*; D009784:Occupational Diseases / Q000517:prevention & control; D016896:Treatment Outcome