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Magazine ad insert introducing RCA Photophone, 1928. In April 1928, RCA Photophone Inc. was created as a subsidiary of RCA (itself then a GE subsidiary) to commercially exploit the Photophone system. David Sarnoff was president and a member of the board of directors. The RCA system continued to use the galvanometer until the 1970s, when it became
RCA Victor popularized combined radio receiver-phonographs, and also created RCA Photophone, a movie sound-on-film system that competed with William Fox's sound-on-film Movietone and Warner Bros.' sound-on-disc Vitaphone. Although early announcements of the RCA and Victor merger stressed that the two firms were linking equally to form a joint ...
RCA executive David Sarnoff engineered the merger to create a market for the company's sound-on-film technology, RCA Photophone, and in early 1929 production began under the RKO name (an initialism of Radio-Keith-Orpheum). Two years later, another Kennedy concern, the Pathé studio, was folded into the operation.
A photophone receiver and headset, one half of Bell and Tainter's optical telecommunication system of 1880. The photophone was similar to a contemporary telephone, except that it used modulated light as a means of wireless transmission while the telephone relied on modulated electricity carried over a conductive wire circuit.
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.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.
The following year, RCA introduced the Type 44A Velocity Microphone. Its tone and pattern control helped reduce reverberation. Many RCA ribbon models are still in use and valued by audio engineers. [13] The BBC-Marconi Type A was an iconic ribbon microphone produced by the BBC and Marconi between 1934 and 1959. [14]
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