Newly defined two- and three-dimensional stereo polar diagrams of MS (mid, side) and XY (crossed) coincident stereo microphones graphically illustrate both the total combined left and right sensitivity to sounds arriving from various directions, and where in the reproduced stereo stage the sounds appear. The three-dimensional stereo polar diagrams also yield other useful characteristics relating in particular to the pickup of reverberation, including the stereo distance factor and the directional encoding of reverberation within the reproduced stereo stage.
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