Schallquellenlokalisation: state of the art und neues inverses Verfahren

Translated title of the contribution: Sound source localization – state of the art and new inverse scheme

Stefan Gombots, Jonathan Nowak*, Manfred Kaltenbacher

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Acoustic source localization techniques in combination with microphone array measurements have become an important tool for noise reduction tasks. A common technique for this purpose is acoustic beamforming, which can be used to determine the source locations and source distribution. Advantages are that common algorithms such as conventional beamforming, functional beamforming or deconvolution techniques (e.g., Clean-SC) are robust and fast. In most cases, however, a simple source model is applied and the Green’s function for free radiation is used as transfer function between source and microphone. Additionally, without any further signal processing, only stationary sound sources are covered. To overcome the limitation of stationary sound sources, two approaches of beamforming for rotating sound sources are presented, e.g., in an axial fan. Regarding the restrictions concerning source model and boundary conditions, an inverse method is proposed in which the wave equation in the frequency domain (Helmholtz equation) is solved with the corresponding boundary conditions using the finite element method. The inverse scheme is based on minimizing a Tikhonov functional matching measured microphone signals with simulated ones. This method identifies the amplitude and phase information of the acoustic sources so that the prevailing sound field can be with a high degree of accuracy.

Translated title of the contributionSound source localization – state of the art and new inverse scheme
Original languageGerman
Pages (from-to)229-243
Number of pages15
JournalElektrotechnik und Informationstechnik
Issue number3
Publication statusPublished - Jun 2021

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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