基于传声器阵列的汽车鸣笛声定位算法及实现
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摘要
针对违章鸣笛车辆的锁定问题,本文提出了一种基于传声器阵列空间搜索法的三维空间声源定位算法。设计计算机仿真实验,分析并确定了阵列的传声器个数。通过广义互相关方法估计传声器阵列中任意两个传声器的相对时延,然后结合估计得到的时延,采用基于5传声器阵列的空间搜索法计算得到声源空间位置。为验证算法的可行性,实际构建三维空间的点声源定位系统,进行实车定位实验。实验结果表明提出的算法可以有效地定位汽车鸣笛声。
A 3D sound source localization algorithm based on microphone array space searching is proposed to supervise the illegal car horn. The number of microphone is determined by computer simulation. The first step is to estimate the time delay between arbitrary two microphones in the array using the generalized cross correlation(GCC) method. Then,with the estimated time delay, the space searching method based on 5-microphone array is used to localize the sound source.To verify the algorithm, a point source localization system in 3D space is established to locate the car horn. Experimental results show that the proposed algorithm can effectively locate the car horn.
A 3D sound source localization algorithm based on microphone array space searching is proposed to supervise the illegal car horn. The number of microphone is determined by computer simulation. The first step is to estimate the time delay between arbitrary two microphones in the array using the generalized cross correlation(GCC) method. Then,with the estimated time delay, the space searching method based on 5-microphone array is used to localize the sound source.To verify the algorithm, a point source localization system in 3D space is established to locate the car horn. Experimental results show that the proposed algorithm can effectively locate the car horn.
引文
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[2]KNAPP C,CARTER G.The generalized correlation method for estimation of time delay[J].IEEE Trans.Acoust.Speech Signal Process,2003,24(4):320-327.
[3]REED F A,FEINTUCH P L,BERSHAD N J.Time delay estimation using the LMS adaptive filter-Static behavior[J].IEEE Trans.Acoust.Speech Signal Process,1981,29(3):561-571.
[4]YOUN D,AHMED N,CARTER G.On using the LMS algorithm for time delay estimation[J].IEEE Trans.Acoust.Speech Signal Process,1982,30(5):798-801.
[5]BENESTY J.Adaptive eigenvalue decomposition algorithm for passive acoustic source localization[J].J.Acoust.Soc.Am,2000,107(107):384-391.
[6]GREENFIELD S,Clift M.Speaker localization in a reverberant environment[C].In Electrical and Electronics Engineers in Israel,2002.the Convention.2003:7-9.
[7]张志飞,袁琼,徐中明,等.汽车喇叭声特性试验分析[J].汽车工程学报,2013(6):400-404.
[8]孙懋珩,俞莹婷.汽车鸣笛声定位系统仿真[J].声学技术,2009(5):640-644.
[9]WU S F,ZHU N.Locating arbitrarily time-dependent sound sources in three dimensional space in real time[J].J.Acoust.Soc.Am.,2010,128(2):728.
[10]ABEL J,SMITH J.The spherical interpolation method for closed-form passive source localization using range difference measurements[C].In Acoustics,Speech,and Signal Processing,IEEE International Conference on ICASSP.1987:471-474.