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Convention Paper

Spherical Microphone Array for Spatial Sound Recording

Authors: Meyer, Jens; Agnello, Tony

AES Convention 115 · Paper 5975 · October 2003

Abstract

This paper describes a beamforming spherical microphone array consisting of many acoustic pressure sensors mounted on the surface of a rigid sphere. The beamformer is based on a spherical harmonic decomposition of the sound field. We show that this design allows a simple and computationally effective, yet very flexible beamformer structure. The spherical shape of the array in combination with the beamformer allows steering the look-direction the to any angle in 3-D space. Measurements from an array with 37.5mm radius that consists of 24 senors are presented. The paper focuses on the applications of directional sound pick-up and sound field analysis and reconstruction. Other suitable applications are e.g. room acoustic measurements and 'forensic beamforming'.

Details

Published in
AES Convention 115
AES Convention
115
Paper number
5975
Publication date
October 6, 2003
Session subject
Spatial Audio
Affiliation
mh acoustics, Summit, NJ (See document for exact affiliation information.)
Type
Convention Paper