Gaumont Chronophone was a French sound-on-disc system originally patented in 1902 by Société des Etablissements L. Gaumont. The system was not capable of sound recording at the time of photography. Instead, performers lip-synched to commercially-marketed gramophone-compatible discs previously recorded by the performer. The Chronophone system would synchronize picture and sound playback in theatres by means of a linked Chrono-Bioscope projector and the Cyclophone, a horn-based, compressed-air amplification disc player.

The sound film equipment was marketed as Elgéphone — so named for the Gaumont studio located in Elgé, a suburb of Paris. The films themselves, known to be produced as early as 1905, were commercially marketed as Gaumont Phonoscène productions (commonly two to three minutes in length) and hundreds of them were produced in France and England and released to theatres.

References: Altman-Sound p. 163 : Website-Wikipedia.