Acoustic beamforming in front of a reflective plane

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openAccess

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A4 Artikkeli konferenssijulkaisussa

Date

2018-11-29

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en

Pages

5
26-30

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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