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Designing a Spherical Microphone Array for the Directional Analysis of Reflections and Reverberation

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Spherical microphone array designs were investigated from the point of view of suitability for directional analysis of reverberant sound fields. Four array geometries (tetrahedron, cube, dodecahedron, geodesic sphere) were considered. Beamforming filters were designed using a constrained gain maximization process. The theoretical performance of each array was then predicted. A room acoustic simulator was used to help assess sufficient directionality and evaluate the suitability of each design. A 32-element geodesic sphere array was constructed and used to make directional measurements in real sound fields.

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Permalink: http://www.aes.org/e-lib/browse.cfm?elib=12447

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