I am attempting to design a system that will receive information about how far a person is from two loudspeakers in a room in real time. The distance should be up to 20 feet if possible. Is anyone aware of a tool that will allow me this flexibility? Infrared sensors seem to be too short-distance. I have thought about using a kinect in the middle of the two speakers but not sure if its depth perception is accurate enough.
Any help would be greatly appreciated.