Inferring the location of reflecting surfaces exploiting loudspeaker directivity

Inferring the location of reflecting surfaces exploiting loudspeaker directivity

Zaccà, V.G. (Student TU Delft)
Martínez-Nuevo, Pablo (Bang and Olufsen A/S)
Møller, Martin Bo (Bang and Olufsen A/S)
Martinez, Jorge (TU Delft Circuits and Systems)
Heusdens, R. (TU Delft Circuits and Systems)

2020

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.

Room geometry estimation
sparse recovery
beamforming
room acoustics
image source model
spatial room impulse response
loudspeaker directivity model

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

978-9-0827-9705-3

Proceedings of the 28th European Signal Processing Conference, EUSIPCO

EUSIPCO 2020, 2021-01-18 → 2021-01-22, Amsterdam, Netherlands

Institutional Repository

conference paper

© 2020 V.G. Zaccà, Pablo Martínez-Nuevo, Martin Bo Møller, Jorge Martinez, R. Heusdens