In technical usage, true stereo means sound recording and sound reproduction that uses stereographic projection to encode the relative positions of objects and events recorded. By combining multiple pan-potted mono signals together, a complete, yet entirely artificial, sound field can be created. The control which is used to vary this relative amplitude of the signal is known as a pan-pot (panoramic potentiometer). By varying the relative amplitude of the signal sent to each speaker, an artificial direction (relative to the listener) can be suggested. Secondly artificial or pan stereo, in which a single-channel ( mono) sound is reproduced over multiple loudspeakers. The signal is then reproduced over multiple loudspeakers to recreate, as closely as possible, the live sound.
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 present, by an array of microphones. Description Two microphones set up to record a piano simultaneously, which creates a stereo sound The word stereophonic derives from the Greek στερεός ( stereós, "firm, solid") + φωνή ( phōnḗ, "sound, tone, voice") and it was coined in 1927 by Western Electric, by analogy with the word stereoscopic. Stereo sound has been in common use since the 1970s in entertainment media such as broadcast radio, recorded music, television, video cameras, cinema, computer audio, and internet. Binaural sound systems are also stereophonic.
This is usually achieved by using two independent audio channels through a configuration of two loudspeakers (or stereo headphones) in such a way as to create the impression of sound heard from various directions, as in natural hearing.īecause the multi-dimensional perspective is the crucial aspect, the term stereophonic also applies to systems with more than two channels or speakers such as quadraphonic and surround sound. Stereophonic sound, or more commonly stereo, is a method of sound reproduction that recreates a multi-directional, 3-dimensional audible perspective.
Time difference in a stereophonic recording of a car going past Notably, such electronic systems require more than one speaker. The inset shows the electronic simulation. The main diagram shows a simplified situation in nature. For other uses, see Stereo (disambiguation). "Stereo" and "Stereophonic" redirect here.
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