Conference paper
Sparse acoustic imaging with a spherical array
Department of Electrical Engineering, Technical University of Denmark1
Acoustic Technology, Department of Electrical Engineering, Technical University of Denmark2
Department of Applied Mathematics and Computer Science, Technical University of Denmark3
Center for Energy Resources Engineering, Centers, Technical University of Denmark4
Scientific Computing, Department of Applied Mathematics and Computer Science, Technical University of Denmark5
In recent years, a number of methods for sound source localization and sound field reconstruction with spherical microphone arrays have been proposed. These arrays have properties that are potentially very useful, e.g. omni-directionality, robustness, compensable scattering, etc. This paper proposes a plane wave expansion method based on measurements with a spherical microphone array, and solved in the framework provided by Compressed Sensing.
The proposed methodology results in a sparse solution, i.e. few non-zero coefficients, and it is suitable for both source localization and sound field reconstruction. In general it provides fine spatial resolution for localization (delta-like functions), and robust reconstruction (the noisy components are naturally suppressed).
The validity and performance of the proposed method is examined, and its limitations as well as the underlying assumptions are addressed.
Language: | English |
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Year: | 2015 |
Pages: | 925-930 |
Proceedings: | EuroNoise 2015 |
Types: | Conference paper |
ORCIDs: | Fernandez Grande, Efren and Xenaki, Angeliki |