Sound source localization in non-line-of-sight environment based on equivalent source method combined with time reversal method

Abstract

Sound source localization is a critical task in various applications. However, it becomes challenging when the sound sources are not directly visible to the sensors due to obstacles or other environmental factors. This paper proposes a novel approach for locating sound sources in non-line-of-sight environments by combining the equivalent source method (ESM) with the time reversal method (TRM). The ESM is used to compute the frequency responses between the focusing points and the measurement points numerically. These frequency responses are then substituted to the TRM to localize the sound sources. To evaluate the performance of the proposed method, it is tested through numerical simulations and an experiment. The results prove that the ESM can compute the frequency responses accurately, and the combination of TRM and ESM effectively localizes sound sources in non-line-of-sight environments.

Keywords

Sound source localization equivalent source time reversal non-light-of-sight frequency response

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References

Cassereau

Fink

. Focusing with plane time-reversal mirrors: an efficient alternative to closed cavities. J Acoust Soc Am 1993; 94(4): 2373–2386.

de Rosny

Fink

. Focusing properties of near-field time reversal. Phys Rev 2007; 76: 065801.

Fannjiang

. On time reversal mirrors. Inverse Probl 2008; 25(9): 095010–095029.

Klemm

Craddock

Leendertz

, et al. Improved delay-and-sum beamforming algorithm for breast cancer detection. Int J Antenn Propag 2008; 2008: 264–276.

Rakotoarisoa

Fischer

Valeau

, et al. Time-domain delay-and-sum beamforming for time-reversal detection of intermittent acoustic sources in flows. J Acoust Soc Am 2014; 136(5): 2675–2686.

Besson

Carrillo

Bernard

, et al. Compressed delay-and-sum beamforming for ultrafast ultrasound imaging[C]. In: IEEE international conference on image processing. USA: ICIP, 2016, pp. 2509–2513.

Loyau

Pascal

Gaillard

. Broadband acoustic holography reconstruction from acoustic intensity measurements - I: principle of the method. J Acoust Soc Am 1988; 84(5): 1744–1750.

Wang

. Helmholtz equation–least-squares method for reconstructing the acoustic pressure field. J Acoust Soc Am 1997; 102(5): 2020–2032.

Chen

. Nearfield acoustic holography based on the equivalent source method. Sci China, Ser A 2005; 48(3): 338–353.

10.

Mak

Furukawa

. Non-line-of-sight localization of a controlled sound source[C]. In: IEEE/ASME international conference on advanced intelligent mechatronics. Singapore: IEEE, 2009, pp. 475–480.

11.

Takami

Liu

Furukawa

, et al. Non-field-of-view sound source localization using diffraction and reflection signals. IEEE/RSJ International Conference on Intelligent Robots & Systems, Korea. 2016; 157–162.

12.

Mennitt

Johnson

. Multiple-array passive acoustic source localization in urban environments. J Acoust Soc Am 2010; 127(5): 2932–2942.

13.

Singh

Knisely

Yönak

, et al. Non-line-of-sight sound source localization using matched-field processing. J Acoust Soc Am 2012; 131(1): 292–302.

14.

Albert

Liu

Moran

. Time reversal processing for source location in an urban environment. J Acoust Soc Am 2005; 118(2): 616–619.

15.

Derode

Roux

Fink

. Robust acoustic time reversal with high-order multiple scattering. Phys Rev Lett 1995; 75(23): 4206–4209.

16.

Johnson

Elliott

Baek

, et al. An equivalent source technique for calculating the sound field inside an enclosure containing scattering objects. J Acoust Soc Am 1998; 104(3): 1221–1231.

17.

Zhang

, et al. Analytical passive time reversal method combined with equivalent source method for sound source localization in an enclosure. J Vib Acoust 2019; 141(3): 031014.