Electrical audio signal processing systems and devices – Directive circuits for microphones
Reexamination Certificate
2005-01-12
2010-10-19
Chin, Vivian (Department: 2614)
Electrical audio signal processing systems and devices
Directive circuits for microphones
C367S103000, C367S108000
Reexamination Certificate
active
07817805
ABSTRACT:
A system and method are provided for automatically tracking the movements of an acoustic source relative to two or more microphones possibly mounted in a portable device. The microphones are mounted so that they may be separated from an acoustic source that can be more than three inches from the portable device. By automatically tracking the location of a portable device, a directional response of unidirectional microphones in a far field setting can be steered so that the radial axis of the directional response aligns with the path in which the acoustic wave travels from the source to the microphones. By tracking the source and steering the directional response of the microphones, the system can thereby properly delay and filter electrical signals added to the outputs from corresponding microphones to maximize the signal-to-noise ratio of the ensuing signal.
REFERENCES:
patent: 4333170 (1982-06-01), Mathews et al.
patent: 4489442 (1984-12-01), Anderson et al.
patent: 4559642 (1985-12-01), Miyaji et al.
patent: 4644512 (1987-02-01), Grilk
patent: 5208864 (1993-05-01), Kaneda
patent: 5452364 (1995-09-01), Bonham
patent: 5473701 (1995-12-01), Cezanne et al.
patent: 5581620 (1996-12-01), Brandstein et al.
patent: 5586191 (1996-12-01), Elko et al.
patent: 5715319 (1998-02-01), Chu
patent: 5778082 (1998-07-01), Chu et al.
patent: 5978490 (1999-11-01), Choi et al.
patent: 6041127 (2000-03-01), Elko
patent: 6185152 (2001-02-01), Shen
patent: 6317501 (2001-11-01), Matsuo
patent: 6469732 (2002-10-01), Chang et al.
patent: 7123727 (2006-10-01), Elko et al.
patent: 7227960 (2007-06-01), Kataoka
Kozicki, “The Importance of the Microphone to the Pocket PC,” 1994, White Paper obtained from www.emkayproducts.com, 4 pages.
Chin Vivian
Daffer Kevin L.
Daffer McDaniel LLP
Kurr Jason R
Motion Computing, Inc.
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