System and method for matching microphones

Details System and method for matching microphones System and method for matching microphones

2006-10-05

2010-11-09

Chin, Vivian (Department: 2614)

Electrical audio signal processing systems and devices

Directive circuits for microphones

C381S091000, C381S097000

Reexamination Certificate

active

07831053

ABSTRACT:
This invention relates to a system (10) and method for matching one or more microphones. A first and second microphone (110, 210) communicates, respectively, a first and second microphone signal to an amplitude compensating means (16) adjusting amplitude of the first microphone signal in accordance with amplitude of the second microphone signal. The amplitude compensating means (16) communicates an adjusted first microphone signal (100) and the second microphone signal (200) to a phase matching means (18) comprising a correction filter means (113) receiving the adjusted first microphone signal (100). The correction filter means (113) comprises a low-pass filter means (111), which is controlled in accordance with a subtraction between the first microphone signal output (102) and the second microphone signal (200), and a high-pass filter means (112), which is controlled in accordance with a comparison between the first microphone signal output (102) and the second microphone signal (200).

REFERENCES:
patent: 7471798 (2008-12-01), Warren
patent: 7587058 (2009-09-01), Fischer et al.
patent: 2003/0198356 (2003-10-01), Thompson
patent: 1 191 817 (2002-03-01), None
patent: 1 458 216 (2004-09-01), None

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