CA2067822A1 - In-wire selective cancellation system - Google Patents

In-wire selective cancellation system

Info

Publication number
CA2067822A1
CA2067822A1 CA2067822A CA2067822A CA2067822A1 CA 2067822 A1 CA2067822 A1 CA 2067822A1 CA 2067822 A CA2067822 A CA 2067822A CA 2067822 A CA2067822 A CA 2067822A CA 2067822 A1 CA2067822 A1 CA 2067822A1
Authority
CA
Canada
Prior art keywords
signal
primary
cancelling
repetitive
signal components
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2067822A
Other languages
French (fr)
Other versions
CA2067822C (en
Inventor
Eldon W. Ziegler, Jr.
John W. Gardner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Noise Cancellation Technologies Inc
Original Assignee
Eldon W. Ziegler, Jr.
John W. Gardner
Noise Cancellation Technologies, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eldon W. Ziegler, Jr., John W. Gardner, Noise Cancellation Technologies, Inc. filed Critical Eldon W. Ziegler, Jr.
Publication of CA2067822A1 publication Critical patent/CA2067822A1/en
Application granted granted Critical
Publication of CA2067822C publication Critical patent/CA2067822C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B1/00—Details
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H21/00—Adaptive networks
    • H03H21/0001—Analogue adaptive filters

Abstract

An in-wire active cancelling system for cancelling undesirable repetitive signal components from a primary electronics signal comprising desired intelligent signal components and undesirable repetitive signal components. The primary electronic signal (101) is fed as an input to an electronic mixer (106). A second input of the electronic mixer (106) receives a repetitive cancelling signal generated by an active cancellation controller (103) to cancel the undesirable repetitive signal component from the primary signal (10) without interfering with passage of the primary signal intelligent signal components.
CA002067822A 1989-10-16 1990-10-16 In-wire selective cancellation system Expired - Fee Related CA2067822C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/421,759 US5126681A (en) 1989-10-16 1989-10-16 In-wire selective active cancellation system
US421,759 1989-10-16

Publications (2)

Publication Number Publication Date
CA2067822A1 true CA2067822A1 (en) 1991-04-17
CA2067822C CA2067822C (en) 1998-09-15

Family

ID=23671931

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002067822A Expired - Fee Related CA2067822C (en) 1989-10-16 1990-10-16 In-wire selective cancellation system

Country Status (7)

Country Link
US (1) US5126681A (en)
EP (1) EP0496797A4 (en)
JP (1) JPH05501488A (en)
KR (1) KR100229095B1 (en)
AU (1) AU643714B2 (en)
CA (1) CA2067822C (en)
WO (1) WO1991006148A1 (en)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5355091A (en) * 1992-05-21 1994-10-11 The United States Of America As Represented By The Secretary Of The Army Apparatus for real time interference signal rejection
WO1993026083A1 (en) * 1992-06-05 1993-12-23 Noise Cancellation Technologies, Inc. Passive selective headset
WO1993026085A1 (en) * 1992-06-05 1993-12-23 Noise Cancellation Technologies Active/passive headset with speech filter
US5638022A (en) * 1992-06-25 1997-06-10 Noise Cancellation Technologies, Inc. Control system for periodic disturbances
US5732143A (en) * 1992-10-29 1998-03-24 Andrea Electronics Corp. Noise cancellation apparatus
GB2279778B (en) * 1993-05-19 1997-06-04 Samsung Electronics Co Ltd Vacuum cleaner
DE4421853A1 (en) * 1994-06-22 1996-01-04 Philips Patentverwaltung Mobile terminal
US5502770A (en) * 1993-11-29 1996-03-26 Caterpillar Inc. Indirectly sensed signal processing in active periodic acoustic noise cancellation
US5737433A (en) * 1996-01-16 1998-04-07 Gardner; William A. Sound environment control apparatus
US6278786B1 (en) 1997-07-29 2001-08-21 Telex Communications, Inc. Active noise cancellation aircraft headset system
US6094623A (en) * 1998-03-25 2000-07-25 The Governors Of The University Of Alberta Non-linear digital adaptive compensation in non-ideal noise environments
US6363345B1 (en) 1999-02-18 2002-03-26 Andrea Electronics Corporation System, method and apparatus for cancelling noise
US6594367B1 (en) 1999-10-25 2003-07-15 Andrea Electronics Corporation Super directional beamforming design and implementation
US20040125962A1 (en) * 2000-04-14 2004-07-01 Markus Christoph Method and apparatus for dynamic sound optimization
DE10018666A1 (en) 2000-04-14 2001-10-18 Harman Audio Electronic Sys Dynamic sound optimization in the interior of a motor vehicle or similar noisy environment, a monitoring signal is split into desired-signal and noise-signal components which are used for signal adjustment
US6978010B1 (en) 2002-03-21 2005-12-20 Bellsouth Intellectual Property Corp. Ambient noise cancellation for voice communication device
DE602004004242T2 (en) * 2004-03-19 2008-06-05 Harman Becker Automotive Systems Gmbh System and method for improving an audio signal
EP1619793B1 (en) * 2004-07-20 2015-06-17 Harman Becker Automotive Systems GmbH Audio enhancement system and method
US8170221B2 (en) * 2005-03-21 2012-05-01 Harman Becker Automotive Systems Gmbh Audio enhancement system and method
DE602005015426D1 (en) 2005-05-04 2009-08-27 Harman Becker Automotive Sys System and method for intensifying audio signals
US20070041606A1 (en) * 2005-08-22 2007-02-22 David Clark Company Incorporated Apparatus and method for noise cancellation in communication headset using dual-coil speaker

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3374514D1 (en) * 1982-01-27 1987-12-17 Racal Acoustics Ltd Improvements in and relating to communications systems
US4589137A (en) * 1985-01-03 1986-05-13 The United States Of America As Represented By The Secretary Of The Navy Electronic noise-reducing system
US4658426A (en) * 1985-10-10 1987-04-14 Harold Antin Adaptive noise suppressor
US4899389A (en) * 1987-02-17 1990-02-06 Clarion Co., Ltd. Pulsating noise removal device
US4726035A (en) * 1987-03-26 1988-02-16 Unisys Corporation Analog/digital adaptive line enhancer
DE3840999A1 (en) * 1988-12-06 1990-06-07 Blaupunkt Werke Gmbh CIRCUIT ARRANGEMENT FOR SUPPRESSING NARROW-BAND INTERFERENCE SIGNALS

Also Published As

Publication number Publication date
KR100229095B1 (en) 1999-11-01
AU643714B2 (en) 1993-11-25
EP0496797A1 (en) 1992-08-05
CA2067822C (en) 1998-09-15
WO1991006148A1 (en) 1991-05-02
US5126681A (en) 1992-06-30
AU6616490A (en) 1991-05-16
KR920704409A (en) 1992-12-19
EP0496797A4 (en) 1993-12-15
JPH05501488A (en) 1993-03-18

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed