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Communication Dans Un Congrès Année : 2014

Design of a robust open spherical microphone array

Résumé

This paper presents a method for designing a robust open spherical microphone array that overcomes the typical problems of open sphere geometries at frequencies related to the zeros of the spherical Bessel functions. The proposed array structure uses only a few additional sampling points inside the spherical volume whose optimal positions are determined by the eigenmodes of the sphere for a given wave number interval. This novel approach minimizes the interpolation error inside the sphere. We illustrate this approach with the design of a 10-th order array using 130 microphones and discuss the simulation results with regard to commonly used error measures (white noise gain, condition number, and interpolation error), and show that the proposed array design compares favorably to previously suggested array designs.
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Dates et versions

hal-01106926 , version 1 (20-01-2015)

Identifiants

  • HAL Id : hal-01106926 , version 1

Citer

Gilles Chardon, Wolfgang Kreuzer, Markus Noisternig. Design of a robust open spherical microphone array. IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), May 2014, Florence, Italie. pp.6860-6863. ⟨hal-01106926⟩
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