Near-coincident pair

spaced-pair microphone technique which uses directional microphones, placed approximately 7″ apart, or the average spacing between ears on a human head. This allows for some amount of phase difference in the two signals, but not enough to lose mono compatibility, combining the level difference recording characteristics of directional coincident-pair microphones in a spaced array. ORTF is the most common near-coincident arrangement, but others include NOS, and the Faulkner array.