Patent · US Active

Microphone calibration with an RGSC beamformer

US8009840B2 · kind B2 · utility

9Cited by

1References

10Claims

0Family size

Assignee

Siemens Audiologische Technik GmbH · DE

Inventors

Walter Kellermann · Eckental, DE
Parijat Ashok Oak · Mumbai, IN

Key dates

Filing date	Sep 29, 2006
Grant date	Aug 30, 2011
Priority date	—
Expiry date	Nov 12, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH04R2430/25
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

It is intended to improve and automate the calculation of calibration filters connected downstream from the microphones of an RGSC beamformer. To this end it is proposed that an adaptive calibration filter calculation unit be used, by means of which calibration filters are calculated from the output signals of adaptive blocking filters such that the power of an output signal of a blocking filter subtracted from a reference signal and filtered by means of a calibration filter respectively is minimized. The calibration filters connected downstream from the microphones are then replaced by the calibration filters thus determined.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.