Comparison of two microphone array geometries for surface impedance estimation | Zendy

Antoine Richard | Zendy; Efrén Fernández-Grande | Zendy

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Comparison of two microphone array geometries for surface impedance estimation

Author(s) -

Antoine Richard,

Efrén Fernández-Grande

Publication year - 2019

Publication title -

the journal of the acoustical society of america

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.619

H-Index - 187

eISSN - 1520-8524

pISSN - 0001-4966

DOI - 10.1121/1.5116705

Subject(s) - acoustics , microphone array , electrical impedance , planar , planar array , microphone , acoustic impedance , plane (geometry) , surface (topology) , particle velocity , materials science , sound pressure , plane wave , optics , physics , computer science , geometry , mathematics , quantum mechanics , ultrasonic sensor , computer graphics (images)

This study examines the estimation of the surface impedance of an absorber with microphone arrays. Two array geometries are compared-a rigid spherical array and a double layer planar array. The impedance is estimated via reconstructing the sound field (pressure and particle velocity) on the absorber's surface, using a plane wave expansion. The comparison is carried out by studying the numerical properties of the two arrays as well as through experimental tests.

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