Audiphone n. An instrument which, placed against the teeth, conveys sound to the auditory nerve and enables the deaf to hear more or less distinctly; a dentiphone.
... Gravity, Artesian Wells, Air, Aneroid Barometer, Ear-Trumpet, Stethoscope, Audiphone, Telephone, Phonograph, Microphone, ... — A Catechism of Familiar Things; Their History, and the Events Which Led to Their Discovery • Benziger Brothers