Sound source localization method based on improved Laplace wavelet time delay extraction

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (9) : 175-185.

NING Fangli, DUAN Shaodong, LI Jing, HUO Jiahui

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Abstract

An acoustic source localization method based on refined Laplace (R-Laplace) wavelet time delay extraction is proposed to solve the localization problem of impact sound generated by penetrating projectiles hitting multi-layer hard targets. This method constructs Laplace wavelet through prior information processing, calculates the correlation coefficient with the acoustic signal to obtain the time delay information, and combines the search matching algorithm to obtain the sound source position of multiple impacts. The sound source acquisition and positioning system was built, and several hard target impact sound tests were carried out. The outdoor experimental results show that compared with the traditional location algorithm based on time difference of arrival (TDOA), this method can accurately locate 4 sound sources on different impacted layers. The average positioning error is 0.3 m, which proves that the algorithm has a large potential for application in sound source localization problems based on time difference of arrival and is important for practical applications of sound source localization problems.

Key words

Laplace wavelet / time delay / time difference of arrival / distributed array;

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NING Fangli, DUAN Shaodong, LI Jing, HUO Jiahui. Sound source localization method based on improved Laplace wavelet time delay extraction[J]. Journal of Vibration and Shock, 2024, 43(9): 175-185

References

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