Stereo
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Stereophonic sound, commonly called stereo, is the reproduction of sound, using two or more independent audio channels, through a symmetrical configuration of loudspeakers, in such a way as to create a pleasant and natural impression of sound heard from various directions, as in natural hearing. It is often contrasted with monophonic (or "monaural", or just mono) sound, where audio is in the form of one channel, often centered in the sound field (analogous to a visual field).
Stereo recordings are used in FM broadcasting and DAB and in several television systems. To record in stereo, sound engineers use various methods, including using two directional microphones, two parallel omnidirectional microphones, or more complex techniques. To remaster monophonic records, various techniques of "pseudo-stereo" or "quasi-stereo" are used to create the impression that the sound was recorded in stereo.
The BBC made radio's first stereo broadcast in December 1925. In the 1930s, Harvey Fletcher of Bell Laboratories investigated techniques for stereophonic recording and reproduction. The first commercial motion picture to be exhibited with stereophonic sound was Walt Disney's Fantasia (1940). By the mid-1950s, multichannel sound was common for big-budget Hollywood motion pictures. In 1953, Remington Records began taping some of its sessions in stereo, including performances by Thor Johnson and the Cincinnati Symphony Orchestra. The US Federal Communications Commission announced stereophonic FM technical standards in April 1961, and licensed regular stereophonic FM radio broadcasting to begin in the United States in 1961. In 1984, Multichannel television sound was adopted by the FCC as the U.S. standard for stereo television transmission.
Stereo
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Stereophonic sound, commonly called stereo, is the reproduction of sound, using two or more independent audio channels, through a symmetrical configuration of loudspeakers, in such ...
Stereophonic sound - Wikipedia, the free encyclopedia
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