Simulation framework for detecting and tracking moving sound sources using acoustical beamforming methods

Tapolczai, Péter and Fiala, Péter and Firtha, Gergely and Rucz, Péter (2019) Simulation framework for detecting and tracking moving sound sources using acoustical beamforming methods. In: DAGA2019 - 45. Jahrestagung für Akustik, 2019. március 18-21., Rostock, Németország.

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Abstract

Microphone arrays and beamforming procedures enable the localization of sound sources and are used in a great number of industrial applications. Remote sound sources can be localized by creating an acoustical image of the spatial distribution of the source strength. Acoustical focusing can also be implemented in order to attain the filtered signal of selected sources. Application to moving sound sources involve a number of challenges, such as taking the Doppler shift into account, or to apply the acoustical focusing with a time-varying focal point. In this contribution a simulation framework for the detection and tracking of moving sources is introduced. It is shown that in case of moving sources, source localization and acoustical focusing can be implemented in a feedback loop to enhance the quality of the detection. The object oriented simulator is capable of evaluating the sound field of arbitrary moving sound sources and contains implementations of various beamforming methods. The reconstruction of the trajectory of the moving source is supplemented by a nonlinear Kalman filter. The tracking of a small unmanned aerial vehicle is demonstrated as an example application.

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