Stereophonic sound or, more commonly, stereo, is a method of sound
reproduction that creates an illusion of multi-directional audible
perspective. This is usually achieved by using two or more independent
audio channels through a configuration of two or more loudspeakers (or
stereo headphones) in such a way as to create the impression of sound
heard from various directions, as in natural hearing. Thus the term
"stereophonic" applies to so-called "quadraphonic" and
"surround-sound" systems as well as the more common two-channel,
two-speaker systems. It is often contrasted with monophonic, or "mono"
sound, where audio is heard as coming from one position, often ahead
in the sound field (analogous to a visual field). Stereo sound has
been in common use since the 1970s in entertainment systems such as
broadcast radio, TV, recorded music, internet, computer audio, and
cinema.The word stereophonic derives from the Greek ÏƒÏ„ÎµÏ ÎµÏŒÏ‚
(stereós, "firm, solid") + φωνή (phŠnḗ, "sound, tone, voice")
and it was coined in 1927 by Western Electric, by analogy with the
word "stereoscopic".Stereo sound systems can be divided into two
forms: the first is "true" or "natural" stereo in which a live sound
is captured, with any natural reverberation or ambience present, by an
array of microphones. The signal is then reproduced over multiple
loudspeakers to recreate, as closely as possible, the live sound. Stereophonic sound Biography, NetWorth, Height, Age, Weight, Family, Married, Son, Daughter