> I assume this is a form of RDF with switched audio.
Upon reading, I think there is no RDF. What it is doing with radio is
placing different radio channels in preselected stereo located spots
allowing the listener to focus on one channel of interest. This is an old
idea-- I have been using it for years with my receivers using a New
Communications Solutions box for 6 channels which I link around the house
with a low power Part 15 stereo transmitter from Crane. I thought of doing
this years (10 or so) ago and implemented it then.
Their system also seems to place audio sounds in the direction from which
they are coming in the same headset.