3-D audio has been suggested as a way to augment communication and provide unique services in future mobile networks. This paper presents some concepts for the use of 3-D audio communications services, which could be implemented in future mobile networks. In order to demonstrate these concepts, a prototype wireless, 3-D audio system, has been built, and evaluated. The system realizes a wireless multi-user virtual 3-D audio communication space, overlaid on the actual space the user inhabits. The system tracks the user`s position and head orientation. It was confirmed that the head tracking and motion feedback helps in greatly improving localization accuracy. 3-D audio processing is a very promising technology that will allow mobile communications systems to evolve from simple voice communications to rich multimedia-multidimensional services.
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