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《Journal of Applied Acoustics》 2019-06
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Robust sound source localization using concentric circular arrays

ZHANG Guochang;WU Ming;HAN Xinyu;WU Shuaibing;YIN Lan;YANG Jun;University of Chinese Academy of Sciences;Key Laboratory of Noise and Vibration Research, Institute of Acoustic, Chinese Academy of Sciences;College of Automation, Beijing Information Science and Technology University;  
One of the factors to decrease the accuracy of the direction of arrival(DOA) of the sound source is the multipath distortion caused by reverberation. The coherent signal subspace method applied to circular arrays can reduce the adverse effects of reflected sound. The method performs harmonic expansion on the circular array and focuses the spatial correlation matrix at each frequency by using the frequency-independent characteristics of steering vector in circular harmonic domain. However, circular array has nulls of expansion coefficient(nulls of Bessel function), which causes severe noise amplification and reduces the robustness of localization. In this paper, a minimum modulus concentric circular array is proposed to alleviate the noise amplification problem at the zeros of the Bessel function. A microphone array hardware was designed to verify the robustness of localization with uniform concentric circular array. Both simulated and experimental results indicate that the concentric circular array with minimum modulus can improve the robustness of DOA when compared to the circular array with the same element number and array aperture.
【Fund】: 国家重点研发计划课题项目(2016YFB1200503);; 国家自然科学基金项目(11474306 11404367 11474307);; 中国科学院声学研究所青年精英科研项目(QNYC201812)
【CateGory Index】: O42
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