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by gugagore
2772 days ago
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I think the (or perhaps only one) key phrase is "beamforming". A single microphone element has a certain sensitivity pattern (e.g. it may be a very directional microphone, or be equally sensitive in all directions). With multiple pick-ups, you can emulate some different sensitivity patterns. A related idea in radar is synthetic-aperture radar (SAR). |
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A lot of the interesting things in audio were inspired by radar. Dan Wiggins at Sonos used to work on radar, and Don Keele created a loudspeaker technology called "CBT" that's based on radar technology.
Because microphones are basically the inverse of loudspeakers, what works in loudspeaker arrays can also work in microphone arrays.