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    《Journal of Applied Acoustics》 2020-04
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    Autoregressive moving average model of fourth-order band-pass loudspeaker systems

    CHEN Li;TIAN Xing;XIA Jie;SHEN Yong;Key Laboratory of Modern Acoustics, MOE, and Institute of Acoustics, Nanjing University;  
    Discrete-time model is the basis for digital controlling the loudspeaker system. An autoregressive moving average(ARMA) model of fourth-order band-pass loudspeaker system improved by LR-2 theory is proposed. Transfer function of the model is presented and then transformed to time domain difference equations to depict the instantaneous status of the loudspeaker system. The experimental results illustrate that, compared with the numerical simulation results from the state-space equation, the ARMA model proposed in this paper is more stable and precise, also shows lower sampling rate requirements. The proposed method provides a reference for the realization of feedforward digital control of loudspeakers.
    【Fund】: 国家重点研发计划项目(2018YFB1403800)
    【CateGory Index】: TN643
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