I integrated teleconferencing facilities into the DIVE system. The aim is that one should be able to automatically speak and hear with the virtual persons he is passing by. Telephones, radios, virtual microphones, conference tables may also exist, as may be seen in the following picture gallery.
Audio and video communication was already the subject of my thesis work. More (old) information can be found in the following reports.
Audio and video communication in distributed virtual environments (short version)
Audio and video communication in distributed virtual environments (long version)