Loudness discomfort level modification.
D000328:Adult; D001299:Audiometry; D001521:Behavior Therapy; D003051:Cochlea; D003638:Deafness / Q000628:therapy*; D004192:Discrimination, Psychological; D004644:Emotions; D006320:Hearing Tests; D006801:Humans; D008875:Middle Aged; D013016:Sound; D013060:Speech; D013637:Tape Recording