An Estimation Method of Parameters for Closed-box Loudspeaker System
An Estimation Method of Parameters for Closed-box Loudspeaker System
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一种闭箱扬声器系统参数估计方法
DOI：
10.1093/ietfec/e91-a.10.3006
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Y. Nomura
中科院分区：
文献类型：
--
作者：
Rika Nakao;Y. Kajikawa;Y. Nomura
本文提出了一种利用模拟退火法估计闭箱扬声器系统的线性和非线性参数的方法，以实现有效的镜面滤波器。由W.Klippel方法确定的非线性参数有时是不准确的和虚构的。相反，由于使用SA，该方法能够以令人满意的精度估计参数；所得到的阻抗和位移特性与实际等效扬声器的阻抗和位移特性相符。围绕这些参数设计的镜面滤波器可以很好地补偿扬声器系统的非线性失真。实验表明，与补偿前相比，该方法可以将非线性失真程度降低5~20分贝。
In this paper, we propose a method that uses Simulated Annealing (SA) to estimate the linear and nonlinear parameters of a closed-box loudspeaker system for implementing effective Mirror filters. The nonlinear parameters determined by W. Klippel's method are sometimes inaccurate and imaginary. In contrast, the proposed method can estimate the parameters with satisfactory accuracy due to its use of SA; the resulting impedance and displacement characteristics match those of an actual equivalent loudspeaker. A Mirror filter designed around these parameters can well compensate the nonlinear distortions of the loudspeaker system. Experiments demonstrate that the method can reduce the levels of nonlinear distortion by 5 dB to 20 dB compared to the before compensation condition.