title: A therapeutic speech amplifier and its use in speech therapy.
mesh_terms: D000669:Amplifiers, Electronic; D002547:Cerebral Palsy / Q000628:therapy; D004582:Electronics, Medical; D006801:Humans; D007825:Laryngectomy; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000628:therapy; D013064:Speech Disorders / Q000628:therapy; D013070:Speech Therapy / Q000295:instrumentation*; D013071:Speech, Alaryngeal; D014826:Vocal Cord Paralysis / Q000628:therapy