Inferring the location of reflecting surfaces exploiting loudspeaker directivity

Conference paper (2020)

Authors

V.G. Zaccà Student

Pablo Martinez-Nuevo Bang and Olufsen A/S

Martin Bo Møller Bang and Olufsen A/S

Jorge Martinez Signal Processing Systems -

R. Heusdens Signal Processing Systems -

Research Group

Signal Processing Systems () (TU Delft)

Beamforming Room acoustics Sparse recovery Room geometry estimation Image source model Spatial room impulse response Loudspeaker directivity model

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http://resolver.tudelft.nl/uuid:fab78428-c4a4-4788-89e5-9b7c0f17d490

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Published Date

2020

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Signal Processing Systems

Abstract

Accurate sound field reproduction in rooms is often limited by the lack of knowledge of the room characteristics. Information about the room shape or nearby reflecting boundaries can, in principle, be used to improve the accuracy of the reproduction. In this paper, we propose a method to infer the location of nearby reflecting boundaries from measurements on a microphone array. As opposed to traditional methods, we explicitly exploit the loudspeaker directivity model (beyond omnidirectional radiation) and the microphone array geometry. This approach does not require noiseless timing information of the echoes as input, nor a tailored loudspeaker-wall-microphone measurement step. Simulations show the proposed model outperforms current methods that disregard directivity in reverberant environments.

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