"The project explores mediated intimacy between remote strangers through music. Two boxes are placed at two remote locations. In each box there is a hole for the head of the user. When "inside" the box the remote users look directly in the eyes of each other. A face tracking algorithm by Kyle McDonald detects the users mouth opening and triggers opera singing. This way the remote strangers can explore intimacy through an opera duet."
Reference: Steven Gelineck. 2014. OperaBooth - an Installation for Intimate Remote Communication through Music. In Proceedings of the 9th Audio Mostly: A Conference on Interaction With Sound (AM'14).
http://media.aau.dk/~stg/operaBooth.html