Direction-of-arrival estimation with blind surface impedance compensation for spherical microphone array

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The direction-of-arrival (DoA) estimation from spherical microphone array data requires mode strength compensation for removing the dependency on the array surface impedance. However, in practice, mismatches exist in the actual and modeled surface impedances and degrade the DoA estimation performance. Herein, a non-parametric beamformer that can accurately estimate DoAs under the mode strength mismatch is proposed. The technique utilizes a block-diagonal covariance matrix and order-dependent normalization of spherical harmonic coefficients. The proposed method tested for various surface impedance mismatches and DoAs shows robust estimation performance with reduced dependency on the array surface impedance.
Publisher
ACOUSTICAL SOC AMER AMER INST PHYSICS
Issue Date
2021-07
Language
English
Citation

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, v.1, no.7, pp.074801

ISSN
0001-4966
DOI
10.1121/10.0005640
URI
http://hdl.handle.net/10203/287019
Appears in Collection
EE-Journal Papers(저널논문)
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