Ramblings...
Do a Google search on Binaural recordings and you should find a few sites that specialize. There are a number of apparatus out there, some by Neumann, but I don't know if all or any recordings will let you know which mics they used.
I own a JVC binaural microphone set from the '70's that's made some pretty neat recordings. When done well, and listened back with headphones, binaural recording offers the most realist 3D aural landscape possible. In my view it blows surround sound away.
Similar to the brain using both eyes to sense depth, (and 3D stereoscopic images) when mics are placed where ears would be, and there's a density between them (simulating the head), then when headphones ensure that the left ear only gets left ear info, and the same with the right, the brain fills in and "hears" things 360 degrees all around.
The only recording process I've ever heard as stunning is Q-Sound as used on Roger Waters' "Amused to Death". But with Q-Sound, you have to be right in the sweet spot between your l/r speakers. If you are, then you "hear" sounds emanating far left and right from where the speakers actually are. Simply amazing.
