Calibration of microphone arrays with an uncalibrated source

Patrick Wijnings (Uitvinder), Rick Scholte (Uitvinder)

Onderzoeksoutput: OctrooiOctrooi-publicatie

Samenvatting

Microphone array calibration that does not require a calibrated source or calibrated reference microphone is provided. We provide a statistical (Bayesian) algorithm that (under condition of reasonable environment noise during calibration) can determine gain and phase differences of a whole array at once, even when the gain and/or phase of the source is unknown. More specifically, a Bayesian regression with complex log-normal prior and complex normal likelihood is employed. The inherent phase-wrapping ambiguity in this regression is resolved by exploiting the similarity of likelihood between a lattice point and its Euclidean Voronoi region.
Originele taal-2Engels
OctrooinummerUS10616682B2
IPCH04R1/40,H04R3/00,H04R29/00
Prioriteitsdatum12/01/18
Indieningsdatum10/01/19
StatusGepubliceerd - 7 apr 2020
Extern gepubliceerdJa

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