Calibration of microphone arrays with an uncalibrated source

Patrick Wijnings (Inventor), Rick Scholte (Inventor)

Research output: PatentPatent publication

Abstract

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.
Original languageEnglish
Patent numberUS10616682B2
IPCH04R1/40,H04R3/00,H04R29/00
Priority date12/01/18
Filing date10/01/19
Publication statusPublished - 7 Apr 2020
Externally publishedYes

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