3D Sound refers to a sound which makes a listener discern significant spatial cues for a sound source such as direction, distance and spatiousness. Therefore generating 3D sound means that one can place sounds anywhere - left or right, up or down, near or far - at one's disposal in 3-dimensional space.
A 3D audio system has the ability to position sounds all around a listener. The sounds are actually created by the loudspeakers(or headphone), but the listener's perception is that the sounds come from arbitrary points in space. This is similar to stereo panning in conventional stereo systems; sounds can be panned to locations between the two loudspeakers, creating virtual images of the sound where there is no loudspeaker. However, conventional stereo systems generally cannot position sounds to the sides or rear of the listener, nor above or below the listener. A 3D audio system attempts to do just that.
3D sound is largely divided into two categories:
A 3D audio system has the ability to position sounds all around a listener. The sounds are actually created by the loudspeakers(or headphone), but the listener's perception is that the sounds come from arbitrary points in space. This is similar to stereo panning in conventional stereo systems; sounds can be panned to locations between the two loudspeakers, creating virtual images of the sound where there is no loudspeaker. However, conventional stereo systems generally cannot position sounds to the sides or rear of the listener, nor above or below the listener. A 3D audio system attempts to do just that.
3D sound is largely divided into two categories:
- Positional sound Image
- Moving sound Image
2 comments:
I can appreciate this in case of a 5.1 or 7.1 speaker system where there are speakers all around me. But I dont quite understand how an earphone can give me a 3D audio effect.
Even your earphone can give you 3D audio effect. This is done by using Head Related Transfer Function(HRTF).
More details can be found at:
http://www.ece.rice.edu/~crozell/courseproj/431report/index.html
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