Pallophotophone (original) (raw)

The pallophotophone (coined from the Greek root words pallo, to oscillate or shake; photo, light; and phone, sound, therefore literally meaning "shaking light sound") was a photographic sound recording and playback system developed by General Electric researcher Charles A. Hoxie circa 1922. The RCA Photophone sound-on-film system for motion pictures was later derived from it.