System with loudspeakers that surround the listener
"Surround" and "3D sound" redirect here. For navigation using 3D sound, see 3D sound localization. For the audio effect, see 3D audio effect. For other uses, see Surround (disambiguation).
For the JID song, see Surround Sound (song). For the Empire of the Sun song, see Ice on the Dune.
16.2 channel surround sound
Surround sound is a technique for enriching the fidelity and depth of sound reproduction by using multiple audio channels from speakers that surround the listener (surround channels). Its first application was in movie theaters. Prior to surround sound, theater sound systems commonly had three screen channels of sound that played from three loudspeakers (left, center, and right) located in front of the audience. Surround sound adds one or more channels from loudspeakers to the side or behind the listener that are able to create the sensation of sound coming from any horizontal direction (at ground level) around the listener.
The technique enhances the perception of sound spatialization by exploiting sound localization: a listener's ability to identify the location or origin of a detected sound in direction and distance. This is achieved by using multiple discrete audio channels routed to an array of loudspeakers.[1] Surround sound typically has a listener location (sweet spot) where the audio effects work best and presents a fixed or forward perspective of the sound field to the listener at this location.
Surround sound formats vary in reproduction and recording methods, along with the number and positioning of additional channels. The most common surround sound specification, the ITU's 5.1 standard, calls for 6 speakers: Center (C), in front of the listener; Left (L) and Right (R), at angles of 60°; Left Surround (LS) and Right Surround (RS) at angles of 100–120°; and a subwoofer, whose position is not critical.[2]
^"Home Theater Glossary of Terms and Terminology". Audiogurus. Retrieved 28 October 2015.
^RECOMMENDATION ITU-R BS.775-1 - Multichannel stereophonic sound system with and without accompanying picture(PDF). ITU-R. 1992.
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