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Design of a robust open spherical microphone array

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text
 

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article
 

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Titre

Design of a robust open spherical microphone array
 

Nom(s)

Chardon, Gilles (auteur)
 
Kreuzer, Wolfgang (auteur)
 
Noisternig, Markus (auteur)
 

Publication

Florence, Italy , 2014
 

Description

Sujet(s)

spherical microphone array   sound field analysis
 

Résumé

This paper presents a method for designing a robust open spherical microphone array that overcomes the typical prob- lems 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 in- terval. This novel approach minimizes the interpolation error inside the sphere. With 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 mea- sures (white noise gain, condition number, and interpolation error), and show that the proposed array design compares fa- vorably to previously suggested array designs.
 

Note(s)

Contribution au colloque ou congrès : IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)
 

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2014-02-05 01:00:00
 

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