Technical & Applied Article

Capabilities of inverse scheme for acoustic source localization at low frequencies

¹ Institute of Mechanics and Mechatronics, TU Wien, Austria
² Institute of Fundamentals and Theory in Electrical Engineering, TU Graz, Austria
³ Department of Mathematics, Alpen-Adria-Universität Klagenfurt, Austria

^* Corresponding author: stefan.gombots@tuwien.ac.at

Received: 22 January 2021
Accepted: 1 September 2021

Abstract

We present the capabilities of a recently developed inverse scheme for source localization at low frequencies within an arbitrary acoustic environment. The inverse scheme is based on minimizing a Tikhonov functional matching measured microphone signals with simulated ones. We discuss the sensitivity of all involved parameters, the precision of geometry and physical boundary modeling for the numerical simulation using the finite element (FE) method, and the automatic determination of the positions of the recording microphones being distributed around the object of investigation. Finally, we apply the inverse scheme to a real-world scenario and compare the obtained results to state-of-the-art signal processing approaches, e.g. Clean-SC.