The last of these near coincident methods commonly used is the Binaural
technique. This is intended specifically for playback on a pair of headphones.
It is most often setup as a pair of Omnidirectional microphones placed onto a
dummy head or worn on ones own head. This yields results which are quite
impressive , with a very realistic illusion of space in both the vertical
and horizontal planes. The quasi binaural method employs two Omnidirectional
microphones spaced about 75 to 100 cm apart with a sound absorbing baffle in
between them. This provides enough cross channeling information to yield very
good results when played back on loudspeakers (which a dummy head recording
won't do). This is the stand mounted method we recombined for our Micro-Mics.