Patent ID: 6845163

Claim:
A sound recording arrangement comprising: a plurality of at least three microphones that point at directions substantially on a horizontal plane, with at least one pair of said microphones providing a sound time-of-arrival difference of approximately 0.9 msec, one additional microphone that points at a direction that is substantially perpendicular and upward from said horizontal plane, and another additional microphone that points at a direction that is substantially perpendicular and downward from said horizontal plane; means for communicating signals of said microphones to other equipment a processor for combining selected ones of said signals of said plurality of at least three microphones where said processor develops a modified signal s h ′ = s h + 1 N ⁢ ( s u + s d ) , for each signal s h , of a microphone from said plurality of at least three microphones that points at a direction that lies substantially on said horizontal plane, where s u is the signal of said microphone that points substantially upward relative to said horizontal place, and said s j is the signal of said microphone that points substantially downward relative to said horizontal place.