The generalized cross-correlation (GCC) based inverse model is a promising time domain localization technique for a broadband acoustic source. Its performance is affected by the temporal width threshold of the propagation model matrix. The appropriate threshold should vary with focus distance, array geometry, and array size, but there is still a lack of uniform and effective methods to determine it. To solve this issue and perfect the technique, a method is proposed based on the cumulative probability of all differences of time delay estimation between the focus point and the microphone pair. Further, an alternative propagation model matrix is derived, which circumvents the threshold. Both proposed methods are effective under different simulation and experimental configurations, with strong stability and adaptability to focus distance, array geometry, and array size. The GCC based inverse model with either proposed method not only enjoys satisfactory source localization performance, including narrow mainlobes, few spurious sources, and highlighted source positions, but also can correctly estimate the sound level, which is comparable to that with the preset appropriate temporal width threshold. In terms of the computational time, the inverse model with the latter proposed method outperforms that with the former one.
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April 2020
April 01 2020
Determination of propagation model matrix in generalized cross-correlation based inverse model for broadband acoustic source localization Available to Purchase
Zhigang Chu;
Zhigang Chu
a)
State Key Laboratory of Mechanical Transmissions, Chongqing University
, Chongqing 400044, People's Republic of China
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Jing Weng;
Jing Weng
State Key Laboratory of Mechanical Transmissions, Chongqing University
, Chongqing 400044, People's Republic of China
Search for other works by this author on:
Yang Yang
Yang Yang
State Key Laboratory of Mechanical Transmissions, Chongqing University
, Chongqing 400044, People's Republic of China
Search for other works by this author on:
Zhigang Chu
a)
State Key Laboratory of Mechanical Transmissions, Chongqing University
, Chongqing 400044, People's Republic of China
Jing Weng
State Key Laboratory of Mechanical Transmissions, Chongqing University
, Chongqing 400044, People's Republic of China
Yang Yang
State Key Laboratory of Mechanical Transmissions, Chongqing University
, Chongqing 400044, People's Republic of China
a)
Electronic mail: [email protected], ORCID: 0000-0001-5603-4590.
J. Acoust. Soc. Am. 147, 2098–2109 (2020)
Article history
Received:
November 05 2019
Accepted:
March 12 2020
Citation
Zhigang Chu, Jing Weng, Yang Yang; Determination of propagation model matrix in generalized cross-correlation based inverse model for broadband acoustic source localization. J. Acoust. Soc. Am. 1 April 2020; 147 (4): 2098–2109. https://doi.org/10.1121/10.0000973
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