Performance of an independent planar virtual sound barrier at the opening of a rectangular enclosure

Jiancheng Tao, S. Wang, X. Qiu, Jie Pan

    Research output: Contribution to journal › Article

    12 Citations (Scopus)
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    Abstract

    © 2015 Elsevier Ltd. All rights reserved. Planar virtual sound barrier systems have been used successfully to reduce noise radiation through an opening without affecting natural ventilation and lighting. However, the complexity of a fully coupled control system grows at the rate proportional to the square of the number of channels and this make the system implementation become impractical for enclosures with large openings. To reduce the system complexity, this paper proposes an independent planar virtual sound barrier, which is a multi-channel system consisting of many independent single channel active noise control systems. Each single channel system is "independent" in the sense that the control source output of the system is updated only with the signal from its own error sensor. Based on the analytical model of sound radiation through the opening of a rectangular enclosure, the transfer functions from both primary and control sources are calculated first. Then the noise reduction performance, the stability, and the convergence behavior of both fully coupled and independent planar virtual sound barrier systems are investigated. It is found that the independent system with no control output constraint becomes inherently unstable at some frequencies; however its stability can be improved by applying some control output constraint. Reducing the number of channels and the distance between secondary loudspeakers and error microphones can also increase system stability but at the cost of smaller noise reduction. When the system is inherently stable and there is no constraint on control output, the independent system can provide the same noise reduction as the fully coupled one but with faster convergence speed.
    Original languageEnglish
    Pages (from-to)215-223
    JournalApplied Acoustics
    Volume105
    Early online date30 Dec 2015
    DOIs
    Publication statusPublished - Apr 2016

    Fingerprint

    enclosure
    acoustic velocity
    noise reduction
    output
    electromagnetic noise
    systems stability
    ventilation
    loudspeakers
    microphones
    transfer functions
    illuminating
    acoustics
    sensors
    radiation

    Cite this

    Tao, Jiancheng ; Wang, S. ; Qiu, X. ; Pan, Jie. / Performance of an independent planar virtual sound barrier at the opening of a rectangular enclosure. In: Applied Acoustics. 2016 ; Vol. 105. pp. 215-223.
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    abstract = "{\circledC} 2015 Elsevier Ltd. All rights reserved. Planar virtual sound barrier systems have been used successfully to reduce noise radiation through an opening without affecting natural ventilation and lighting. However, the complexity of a fully coupled control system grows at the rate proportional to the square of the number of channels and this make the system implementation become impractical for enclosures with large openings. To reduce the system complexity, this paper proposes an independent planar virtual sound barrier, which is a multi-channel system consisting of many independent single channel active noise control systems. Each single channel system is {"}independent{"} in the sense that the control source output of the system is updated only with the signal from its own error sensor. Based on the analytical model of sound radiation through the opening of a rectangular enclosure, the transfer functions from both primary and control sources are calculated first. Then the noise reduction performance, the stability, and the convergence behavior of both fully coupled and independent planar virtual sound barrier systems are investigated. It is found that the independent system with no control output constraint becomes inherently unstable at some frequencies; however its stability can be improved by applying some control output constraint. Reducing the number of channels and the distance between secondary loudspeakers and error microphones can also increase system stability but at the cost of smaller noise reduction. When the system is inherently stable and there is no constraint on control output, the independent system can provide the same noise reduction as the fully coupled one but with faster convergence speed.",
    author = "Jiancheng Tao and S. Wang and X. Qiu and Jie Pan",
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    Tao, J, Wang, S, Qiu, X & Pan, J 2016, 'Performance of an independent planar virtual sound barrier at the opening of a rectangular enclosure' Applied Acoustics, vol. 105, pp. 215-223. https://doi.org/10.1016/j.apacoust.2015.12.019

    Performance of an independent planar virtual sound barrier at the opening of a rectangular enclosure. / Tao, Jiancheng; Wang, S.; Qiu, X.; Pan, Jie.

    In: Applied Acoustics, Vol. 105, 04.2016, p. 215-223.

    Research output: Contribution to journal › Article

    TY - JOUR

    T1 - Performance of an independent planar virtual sound barrier at the opening of a rectangular enclosure

    AU - Tao, Jiancheng

    AU - Wang, S.

    AU - Qiu, X.

    AU - Pan, Jie

    PY - 2016/4

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    N2 - © 2015 Elsevier Ltd. All rights reserved. Planar virtual sound barrier systems have been used successfully to reduce noise radiation through an opening without affecting natural ventilation and lighting. However, the complexity of a fully coupled control system grows at the rate proportional to the square of the number of channels and this make the system implementation become impractical for enclosures with large openings. To reduce the system complexity, this paper proposes an independent planar virtual sound barrier, which is a multi-channel system consisting of many independent single channel active noise control systems. Each single channel system is "independent" in the sense that the control source output of the system is updated only with the signal from its own error sensor. Based on the analytical model of sound radiation through the opening of a rectangular enclosure, the transfer functions from both primary and control sources are calculated first. Then the noise reduction performance, the stability, and the convergence behavior of both fully coupled and independent planar virtual sound barrier systems are investigated. It is found that the independent system with no control output constraint becomes inherently unstable at some frequencies; however its stability can be improved by applying some control output constraint. Reducing the number of channels and the distance between secondary loudspeakers and error microphones can also increase system stability but at the cost of smaller noise reduction. When the system is inherently stable and there is no constraint on control output, the independent system can provide the same noise reduction as the fully coupled one but with faster convergence speed.

    AB - © 2015 Elsevier Ltd. All rights reserved. Planar virtual sound barrier systems have been used successfully to reduce noise radiation through an opening without affecting natural ventilation and lighting. However, the complexity of a fully coupled control system grows at the rate proportional to the square of the number of channels and this make the system implementation become impractical for enclosures with large openings. To reduce the system complexity, this paper proposes an independent planar virtual sound barrier, which is a multi-channel system consisting of many independent single channel active noise control systems. Each single channel system is "independent" in the sense that the control source output of the system is updated only with the signal from its own error sensor. Based on the analytical model of sound radiation through the opening of a rectangular enclosure, the transfer functions from both primary and control sources are calculated first. Then the noise reduction performance, the stability, and the convergence behavior of both fully coupled and independent planar virtual sound barrier systems are investigated. It is found that the independent system with no control output constraint becomes inherently unstable at some frequencies; however its stability can be improved by applying some control output constraint. Reducing the number of channels and the distance between secondary loudspeakers and error microphones can also increase system stability but at the cost of smaller noise reduction. When the system is inherently stable and there is no constraint on control output, the independent system can provide the same noise reduction as the fully coupled one but with faster convergence speed.

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    SN - 0003-682X

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    Tao J, Wang S, Qiu X, Pan J. Performance of an independent planar virtual sound barrier at the opening of a rectangular enclosure. Applied Acoustics. 2016 Apr;105:215-223. https://doi.org/10.1016/j.apacoust.2015.12.019

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