New Talking Movies Replace Stenographer’s Note Book (Sep, 1930)
New Talking Movies Replace Stenographer’s Note Book
THE movietone principle of recording the human voice has been adapted to office use in a machine which has been named the “Dailygraph.” The device is primarily intended for dictating letters in the office but may be used to record speeches for translation or future reproduction for educational and historical purposes. It is a German patent and has been placed on the market in continental countries.
The speaker talks into a mouthpiece similar to that of an ordinary telephone, and the vibrating diaphragm transmits the sounds to the machine in the form of electrical impulses which in turn are converted to light waves. These are recorded on the narrow strip of film similar to that used in the talking movies. When reproducing the voice, the mere pressure of a button reverses the process, and the sound may be projected at will either through the loud speaker or ear phones.