title: Hearing aid efficiency in a competing speech situation.
mesh_terms: D000328:Adult; D000368:Aged; D001307:Auditory Perception; D001309:Auditory Threshold; D004192:Discrimination, Psychological; D005260:Female; D006310:Hearing Aids; D006801:Humans; D008297:Male; D008875:Middle Aged; D013060:Speech