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麦克风阵列幅相误差校准的最小二乘系统辨识研究

高自跑 柳小勤 王之海

高自跑, 柳小勤, 王之海. 麦克风阵列幅相误差校准的最小二乘系统辨识研究[J]. 机械科学与技术, 2023, 42(7): 1109-1113. doi: 10.13433/j.cnki.1003-8728.20220087
引用本文: 高自跑, 柳小勤, 王之海. 麦克风阵列幅相误差校准的最小二乘系统辨识研究[J]. 机械科学与技术, 2023, 42(7): 1109-1113. doi: 10.13433/j.cnki.1003-8728.20220087
GAO Zipao, LIU Xiaoqin, WANG Zhihai. Study on Least Squares System Identification for Gain-phase Errors Calibration of Microphone Array[J]. Mechanical Science and Technology for Aerospace Engineering, 2023, 42(7): 1109-1113. doi: 10.13433/j.cnki.1003-8728.20220087
Citation: GAO Zipao, LIU Xiaoqin, WANG Zhihai. Study on Least Squares System Identification for Gain-phase Errors Calibration of Microphone Array[J]. Mechanical Science and Technology for Aerospace Engineering, 2023, 42(7): 1109-1113. doi: 10.13433/j.cnki.1003-8728.20220087

麦克风阵列幅相误差校准的最小二乘系统辨识研究

doi: 10.13433/j.cnki.1003-8728.20220087
基金项目: 

国家自然科学基金项目 51875272

云南省教育厅科学研究基金项目 2018JS025

详细信息
    作者简介:

    高自跑(1994-), 硕士研究生, 研究方向为基于三维声强的传声器精确校准, 2517944259@qq.com

    通讯作者:

    柳小勤, 副教授, 硕士生导师, liuxqsmile@gmail.com

  • 中图分类号: TN06;TB52

Study on Least Squares System Identification for Gain-phase Errors Calibration of Microphone Array

  • 摘要: 阵列幅相误差显著降低了麦克风阵列的声源定位算法性能,研究了一种麦克风阵列幅相误差有源宽带近场校准方法。该方法采用一个校准源,线性正弦扫频信号作为激励信号,它先对阵列接受到的信号进行幅值和相位补偿,以阵列中的一个阵元作为参考阵元,把参考阵元与待校准阵元当作单输入单输出线性系统,然后通过递推最小二乘(RLS)系统辨识算法获得用于通道校准的FIR滤波器。用三维声强探头阵列进行校准和声源定位实验,验证了所提出的校准方法实用有效。
  • 图  1  三维声强探头麦克风阵列

    Figure  1.  3D sound intensity probe microphone array

    图  2  麦克风阵列校准实验装置

    Figure  2.  Experimental setup for microphone array calibration

    图  3  FIR滤波器的频率特性曲线

    Figure  3.  Frequency characteristic curve for the FIR filter

    图  4  声源定位实验装置

    Figure  4.  Experimental setup for sound source localization

    图  5  声源方位角误差直方图

    Figure  5.  Histogram of sound source azimuth angle error

    表  1  相位失配校准结果

    Table  1.   Phase mismatch calibration results

    参数名 频率/Hz
    500 1 000 1 500 2 000
    理论值 0 0 0 0
    麦克风2与麦克风1相位差/(°) 校准前 -3.643 1 -6.146 9 -4.187 5 -3.987 4
    校准后 -1.806 1 -2.457 9 0.712 5 1.107 6
    理论值 18.494 1 36.988 2 55.482 3 73.976 4
    麦克风3与麦克风1相位差/(°) 校准前 14.911 3 34.865 4 50.031 4 71.211 5
    校准后 16.431 3 37.699 4 53.622 4 74.538 5
    理论值 18.494 1 36.988 2 55.482 3 73.976 4
    麦克风4与麦克风1相位差/(°) 校准前 20.541 2 39.364 4 57.312 2 79.154 2
    校准后 16.919 2 36.009 4 54.006 2 74.787 2
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-02-29
  • 刊出日期:  2023-07-25

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