Panning is the spread of a monaural signal in a stereo or multi-channel sound field. A typical pan control is constant power. At one extreme, the sound appears in only one channel. In the middle, the sound is decreased in that channel by 3 dB, and the other channel is brought up to the same level, so that the overall sound power level is always constant.[1] Monaural (often shortened to mono) sound reproduction is single-channel. ... Symbol for stereo Stereophonic sound, commonly called stereo, is the reproduction of sound, using two independent audio channels, through a pair of widely separated speaker systems, in such a way as to create a pleasant and natural impression of sound heard from various directions as in natural hearing. ... The decibel (dB) is a measure of the ratio between two quantities, and is used in a wide variety of measurements in acoustics, physics and electronics. ... Sound power level or acoustic power level is a logarithmic measure of the sound power in comparison to a specified reference level. ...
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