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NRG Acoustics SG-4: Multichannel audio
Multichannel surround sound is a technique of enhancing the sound processing quality of any audio source with additional audio channels from speakers that surround the listener (surround channels), providing sound from a 360 radius within the horizontal plane (2D) contrary to "screen channels" (centre, [front] left, and [front] right) coming from only within the listener's frontward arc.
Surround sound is characterized by a listener location or sweet spot where the audio effects perform the best, and features a constant or forward perspective of the sound field towards listener at this location. The procedure improves the belief of sound spatialization by taking advantage of sound localization; a listener's ability to know the location or origin of a noticed sound in direction and distance. Typically this is achieved by utilizing multiple discrete audio channels routed to an array of loudspeakers.
There are various multichannel surround sound based models and techniques, differing in reproduction and recording methods together with the amount and placement more channels.
NRG Acoustics SG-4: Fields of use
Though cinema and soundtracks represent the primary purposes of surround techniques, its scope of application is more expansive than that as multichannel audio permits creation of an audio-environment for all sorts of purposes. Multichannel techniques are useful to recreate contents as varied as music, speech, natural or synthetic sounds for cinema, television, transmissions, or computer systems. Regarding music material to illustrate, an active performance may also use multichannel approaches to the context connected with an open-air event, of an musical theatre or perhaps for broadcasting; for a film specific techniques are tailored to cinema, or to home (e.g. home cinema systems).
The narrative area is also a content that could be enhanced through multichannel approaches. This is applicable mainly to cinema narratives, as an example the speech of the characters of a film, but can even be utilized on plays for theatre, to a convention, or to blend voice-based comments in an archeological site or monument. Just like, an exhibition could very well be enhanced with topical ambient sound of water, wild birds, train or machine noises. Applicable natural sounds can also be used in informative applications.
NRG Acoustics SG-4 - Other sorts of fields of application incorporate video game controllers, personal computers and other platforms.
In this applications, the material would typically be synthetic noise produced by the computer gadget in interaction with its user. Substantial work has been specifically done using multichannel for enhanced situation awareness in government and general public safety purposes.
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