"TRIOPTOPHON"--THREE-DIMENSIONAL "PHONETIC MIRROR" COMBINED WITH AMPLIFIER.
D001296:Audiovisual Aids; D003638:Deafness; D034381:Hearing Loss; D006801:Humans; D007802:Language; D008085:Lipreading; D010700:Phonetics; D013064:Speech Disorders; D013070:Speech Therapy
AUDIO-VISUAL AIDS; DEAFNESS; LIP READING; SPEECH DISORDERS; SPEECH THERAPY