audiphone

The audiphone has been recently tried in the Board School for Deaf and

Scientific American Supplement, No. 275, April 9, 1881

Some 20 per cent. of the pupils in deaf and dumb schools have sufficient power of hearing when assisted by the audiphone to enable them to take their places in the classes of the ordinary schools.

Scientific American Supplement, No. 275, April 9, 1881

To a large extent they are responsible for the development of radio, the development of broadcasting equipment, the development of trans-Atlantic telephony, the development of the artificial larynx, the audiphone for testing hearing, and permalloy which enables telegraph cables to carry several times the load which they were previously able to carry, and dozens of other very interesting and very useful developments.

The Birthplace of Sound

He pushed his audiphone and mirror-grid to one side.

Wandl the Invader

Grantline's voice in my audiphone broke my despairing thoughts.

Brigands of the Moon

As my grip upon him made audiphone contact, his agonized scream rattled the diaphragms of my ear grids with horrible, deafening intensity.

Brigands of the Moon

I whispered into the audiphone, "It's coming over the crater."

Brigands of the Moon

His voice sounded from the tiny audiphone grid within my helmet.

Wandl the Invader

And then an interior audiphone blared a calling for Grantline.

Brigands of the Moon

An audiphone buzzer interrupted him, a call from the duty man in the instrument room of the nearby building.

Brigands of the Moon