This is a very natural stereo recording method of 3-Dimensional ‘psycho-acoustic’ pressure-zone mic (PZM type) recording, (this is the ‘skin-proximity’ acoustic sound which surrounds our own head) and allows the recording of true sound-source directional cues created by the head’s acoustic pressure signature (a.k.a., ‘Head Related Transfer Function’ or HRTF) and later interpreted by our ear-brain perception process as true full-ambient ‘surround sound’ stereo.
In more conventional terms, the pattern received is that of two high quality very precision matched ‘spaced omni’ mics positioned in a specific area on the sides of a real person’s head…. or…. specialized ‘acoustic head’ baffle. Therefore, the reception pattern is directly related to the overall quality of the microphones to pickup the HRTF effects….the creation of acoustic psycho-acoustical spatial cues….. of the ‘head’ baffle.