Noise-canceling headphones. Reducing a roar.
Fischetti
Mark
M
D000162:Acoustics / Q000295:instrumentation; D004423:Ear; D006311:Hearing Disorders / Q000209:etiology / Q000517:prevention & control; D006801:Humans; D009622:Noise / Q000009:adverse effects / Q000517:prevention & control*