Design and Test of a Feedback Controller for Attenuating Low Frequency Noise in a Room

C. Bao, Roshun Paurobally, Jie Pan

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    A single-channel feedback control system is presented for global noise attenuation inside a room. The controller design is based on the compensation filter approach of classical control theory. To demonstrate the global noise attenuation capability of this simple control scheme experimental results of noise control in an office are presented. They show that the positioning of the error microphone relative to the control loudspeaker greatly affects the global noise attenuation performance. If the microphone is placed too close to the control source, the microphone signal is dominated by the near field and little global noise reduction is achieved. If the error sensor is placed further away where the near field has little effect on the microphone signal, noise reductions of about 10 dB can be obtained over low frequency ranges.
    Original languageEnglish
    Pages (from-to)61-66
    JournalAcoustics Australia
    Volume37
    Issue number2
    Publication statusPublished - 2009

    Fingerprint

    noise reduction
    rooms
    controllers
    microphones
    low frequencies
    near fields
    control theory
    loudspeakers
    feedback control
    positioning
    frequency ranges
    filters
    sensors

    Cite this

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    title = "Design and Test of a Feedback Controller for Attenuating Low Frequency Noise in a Room",
    abstract = "A single-channel feedback control system is presented for global noise attenuation inside a room. The controller design is based on the compensation filter approach of classical control theory. To demonstrate the global noise attenuation capability of this simple control scheme experimental results of noise control in an office are presented. They show that the positioning of the error microphone relative to the control loudspeaker greatly affects the global noise attenuation performance. If the microphone is placed too close to the control source, the microphone signal is dominated by the near field and little global noise reduction is achieved. If the error sensor is placed further away where the near field has little effect on the microphone signal, noise reductions of about 10 dB can be obtained over low frequency ranges.",
    author = "C. Bao and Roshun Paurobally and Jie Pan",
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    language = "English",
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    Design and Test of a Feedback Controller for Attenuating Low Frequency Noise in a Room. / Bao, C.; Paurobally, Roshun; Pan, Jie.

    In: Acoustics Australia, Vol. 37, No. 2, 2009, p. 61-66.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Design and Test of a Feedback Controller for Attenuating Low Frequency Noise in a Room

    AU - Bao, C.

    AU - Paurobally, Roshun

    AU - Pan, Jie

    PY - 2009

    Y1 - 2009

    N2 - A single-channel feedback control system is presented for global noise attenuation inside a room. The controller design is based on the compensation filter approach of classical control theory. To demonstrate the global noise attenuation capability of this simple control scheme experimental results of noise control in an office are presented. They show that the positioning of the error microphone relative to the control loudspeaker greatly affects the global noise attenuation performance. If the microphone is placed too close to the control source, the microphone signal is dominated by the near field and little global noise reduction is achieved. If the error sensor is placed further away where the near field has little effect on the microphone signal, noise reductions of about 10 dB can be obtained over low frequency ranges.

    AB - A single-channel feedback control system is presented for global noise attenuation inside a room. The controller design is based on the compensation filter approach of classical control theory. To demonstrate the global noise attenuation capability of this simple control scheme experimental results of noise control in an office are presented. They show that the positioning of the error microphone relative to the control loudspeaker greatly affects the global noise attenuation performance. If the microphone is placed too close to the control source, the microphone signal is dominated by the near field and little global noise reduction is achieved. If the error sensor is placed further away where the near field has little effect on the microphone signal, noise reductions of about 10 dB can be obtained over low frequency ranges.

    M3 - Article

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    JO - Acoustics Australila

    JF - Acoustics Australila

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