Robert W. Lindeman Haruo Noma Paulo Gonçalves de Barros An Empirical Study of Hear-Through Augmented Reality: Using Bone Conduction to Deliver Spatialized Audio. 35-42 2008 VR http://dx.doi.org/10.1109/VR.2008.4480747 conf/vr/2008 db/conf/vr/vr2008.html#LindemanNB08