A filter apparatus for actively reducing noise

Arthur P. Berkhoff (Inventor), G. Nijsse (Inventor)

    Research output: Patent

    14 Downloads (Pure)

    Abstract

    A filter apparatus for reducing noise from a primary noise source, comprising a secondary source signal connector for generating secondary noise to reduce said primary noise and a sensor connector for connecting to a sensor for measuring said primary and secondary noise as an error signal. A first control filter is arranged to receive a reference signal and calculate a control signal for the secondary source signal. A second control filter is arranged to receive a delayed reference signal and calculate an auxiliary control signal; wherein an adaptation circuit is arranged to adapt said second control filter while receiving an error signal as a sum of the auxiliary control signal and an auxiliary noise signal. The auxiliary noise signal is constructed from a difference of the delayed filtered error signal and a delayed control signal. The first control filter is updated by a copy of said updated second control filter.
    Original languageUndefined
    Patent numberEP20060824287
    Priority date7/06/07
    Publication statusSubmitted - 4 Dec 2006

    Keywords

    • METIS-248369
    • IR-64784
    • EWI-12799

    Cite this

    Berkhoff, A. P., & Nijsse, G. (2006). A filter apparatus for actively reducing noise. Manuscript submitted for publication. (Patent No. EP20060824287).
    Berkhoff, Arthur P. (Inventor) ; Nijsse, G. (Inventor). / A filter apparatus for actively reducing noise. Patent No.: EP20060824287.
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    title = "A filter apparatus for actively reducing noise",
    abstract = "A filter apparatus for reducing noise from a primary noise source, comprising a secondary source signal connector for generating secondary noise to reduce said primary noise and a sensor connector for connecting to a sensor for measuring said primary and secondary noise as an error signal. A first control filter is arranged to receive a reference signal and calculate a control signal for the secondary source signal. A second control filter is arranged to receive a delayed reference signal and calculate an auxiliary control signal; wherein an adaptation circuit is arranged to adapt said second control filter while receiving an error signal as a sum of the auxiliary control signal and an auxiliary noise signal. The auxiliary noise signal is constructed from a difference of the delayed filtered error signal and a delayed control signal. The first control filter is updated by a copy of said updated second control filter.",
    keywords = "METIS-248369, IR-64784, EWI-12799",
    author = "Berkhoff, {Arthur P.} and G. Nijsse",
    note = "octrooi aangevraagd door UT ; EP20060824287",
    year = "2006",
    month = "12",
    day = "4",
    language = "Undefined",
    type = "Patent",

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    Berkhoff, AP & Nijsse, G 2006, A filter apparatus for actively reducing noise, Patent No. EP20060824287.

    A filter apparatus for actively reducing noise. / Berkhoff, Arthur P. (Inventor); Nijsse, G. (Inventor).

    Patent No.: EP20060824287.

    Research output: Patent

    TY - PAT

    T1 - A filter apparatus for actively reducing noise

    AU - Berkhoff, Arthur P.

    AU - Nijsse, G.

    N1 - octrooi aangevraagd door UT

    PY - 2006/12/4

    Y1 - 2006/12/4

    N2 - A filter apparatus for reducing noise from a primary noise source, comprising a secondary source signal connector for generating secondary noise to reduce said primary noise and a sensor connector for connecting to a sensor for measuring said primary and secondary noise as an error signal. A first control filter is arranged to receive a reference signal and calculate a control signal for the secondary source signal. A second control filter is arranged to receive a delayed reference signal and calculate an auxiliary control signal; wherein an adaptation circuit is arranged to adapt said second control filter while receiving an error signal as a sum of the auxiliary control signal and an auxiliary noise signal. The auxiliary noise signal is constructed from a difference of the delayed filtered error signal and a delayed control signal. The first control filter is updated by a copy of said updated second control filter.

    AB - A filter apparatus for reducing noise from a primary noise source, comprising a secondary source signal connector for generating secondary noise to reduce said primary noise and a sensor connector for connecting to a sensor for measuring said primary and secondary noise as an error signal. A first control filter is arranged to receive a reference signal and calculate a control signal for the secondary source signal. A second control filter is arranged to receive a delayed reference signal and calculate an auxiliary control signal; wherein an adaptation circuit is arranged to adapt said second control filter while receiving an error signal as a sum of the auxiliary control signal and an auxiliary noise signal. The auxiliary noise signal is constructed from a difference of the delayed filtered error signal and a delayed control signal. The first control filter is updated by a copy of said updated second control filter.

    KW - METIS-248369

    KW - IR-64784

    KW - EWI-12799

    M3 - Patent

    M1 - EP20060824287

    ER -

    Berkhoff AP, Nijsse G, inventors. A filter apparatus for actively reducing noise. EP20060824287. 2006 Dec 4.