The final result heard with headphones is a sound in a certain position of the space. These capabilities tempted us to produce some kind of virtual aural environment in order to generate one interface to a certain information system for blind people. This acoustic environment enables us to make use of one of the major input modalities that the visually impaired have. But nice sounds alone in the space do not solve the complexity of a usable and friendly information system. There are several papers that talk about 3D sound, but a few deal with models or metaphors to exploit these capabilities.
Nodes represent certain documents.
Links reflect semantic relationships among documents. Normally the links are displayed, either explicitly, as a menu of choices on the screen, or implicitly, as an action that is taken when the user does something to an identifiable target object in the interface. The hypertext model offers many advantages, like management of linked reference, content not bound to a fixed structure, dynamic interaction, etc. We propose a special hypermedial model, in which each node has some type that reflects the kind of information that it contains. Each type of node is mapped to a certain speaker in a determined position of space.