The photophone is a telecommunications device that allows transmission of speech on a beam of light. It was invented jointly by Alexander Graham Bell and...

RCA Photophone was the trade name given to one of four major competing technologies that emerged in the American film industry in the late 1920s for synchronizing...

were used, including sound on film formats such as Movietone and RCA Photophone, as well as sound on disc formats like Vitaphone for instance. This list...

Charles Sumner Tainter invented the photophone, the telephone that sent audio over a beam of light. The photophone required sunlight to operate, and a...

millennia, while the earliest electrical device created to do so was the photophone, invented in 1880. An optical communication system uses a transmitter...

believed the photophone's principles were his life's "greatest achievement", telling a reporter shortly before his death that the photophone was "the greatest...

musical synthesizers. Building on the principle first demonstrated by the Photophone of Alexander Graham Bell in 1880, optical sound was developed by several...

Kochi royal family. Padma was renovated in 1971 and air-conditioned with photophone film projector. The renovated theatre was opened by Tamil actor Kamal...

Mobile phone Smartphone Optical telecommunication Optical telegraphy Pager Photophone Prepaid mobile phone Radio Radiotelephone Satellite communications Semaphore...

Mobile phone Smartphone Optical telecommunication Optical telegraphy Pager Photophone Prepaid mobile phone Radio Radiotelephone Satellite communications Semaphore...