Acoustic beamforming in front of a reflective plane

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Conference article in proceedings
Date
2018-11-29
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Language
en
Pages
5
26-30
Series
2018 26th European Signal Processing Conference, EUSIPCO 2018, Volume 2018-September, European Signal Processing Conference
Abstract
In this paper, we consider the problem of beamforming with a planar microphone array placed in front of a wall of the room, so that the microphone array plane is perpendicular to that of the wall. While this situation is very likely to occur in a real life problem, the reflections introduced by the adjacent wall can be the cause of a serious mismatch between the actual acoustic paths and the traditionally employed free-field propagation model. We present an adaptation from the free-field to the so-called reflection-aware propagation model, that exploits an in-situ estimation of the complex and frequency-dependent wall reflectivity. Results presented in a real environment demonstrate that the proposed approach may bring significant improvements to the beamforming process compared to the free-field propagation model, as well as compared to other reflection-aware models that have been recently proposed.
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Citation
Stefanakis , N , Delikaris-Manias , S & Mouchtaris , A 2018 , Acoustic beamforming in front of a reflective plane . in 2018 26th European Signal Processing Conference, EUSIPCO 2018 . vol. 2018-September , 8553103 , European Signal Processing Conference , IEEE , pp. 26-30 , European Signal Processing Conference , Rome , Italy , 03/09/2018 . https://doi.org/10.23919/EUSIPCO.2018.8553103