https://ieeexplore.ieee.org/document/8352907/
Stereo is one of the oldest spatial reproduction methods. At VAAE we have been experimenting with how stereo capabilities can be expanded if the listener’s head rotation and position can be tracked. It turns out quite a bit can be done. Images can be stabilised and produced in any direction, not just between the loudspeakers. In this latest work images are produced in the near-field, within a metre of the listener. This is achieved by controlling two low frequency localisation cues, Inter-aural Time Difference (ITD) and Inter-aural Level Difference (ILD). This is not possible without the tracking though. Tracking systems are currently a bit clunky, but are advancing rapidly, as there are applications in many areas.