Hearing aid with noise-level-controlled selective amplification.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000669:Amplifiers, Electronic; D005260:Female; D006310:Hearing Aids; D006314:Hearing Loss, Conductive / Q000503:physiopathology; D006319:Hearing Loss, Sensorineural / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009622:Noise; D013067:Speech Perception / Q000502:physiology*