Audiphone

a kind of diaphragm held against the upper teeth to -ssist hearing by transmitting sound vibrations to the auditory nerve.
historical examples

every session of the conference saw miss ellis seated in the front pew, audiphone in hand, eagerly intent on the exercises.
miss ellis’s mission mary p. wells smith

i whispered into the audiphone, “it’s coming over the crater.”
brigands of the moon ray c-mmings

upon the audiphone there i was at once connected with a voice, and an anxious man’s face with a two-day growth upon it.
wandl the invader raymond king c-mmings

grantline’s voice in my audiphone broke my despairing thoughts.
brigands of the moon ray c-mmings

grantline’s voice in my audiphone broke my despairing rush of thoughts.
astounding stories of super-science, june, 1930 various

an audiphone buzzer interrupted him, a call from the duty man in the instrument room of the nearby building.
astounding stories of super-science april 1930 various

audiphone, an acoustic instrument by means of which deaf persons are enabled to hear.
the new gresham encyclopedia. vol. 1 part 3 various

i felt at that moment, under the shirt against my skin, the anode of my audiphone tingling.
wandl the invader raymond king c-mmings

so that was what perona had told him over the audiphone just before our noonday meal?
astounding stories of super-science september 1930 various

noun
a type of hearing aid consisting of a diaphragm that, when placed against the upper teeth, conveys sound vibrations to the inner ear