Acoustic holography with a concentric rigid and open spherical microphone array

Authors:
Abhaya Parthy;Craig Jin;Andre van Schaik
Affiliations:
School of Information Technologies, The University of Sydney, Australia;School of Electrical and Information Engineering, The University of Sydney, Australia;School of Electrical and Information Engineering, The University of Sydney, Australia
Venue:
ICASSP '09 Proceedings of the 2009 IEEE International Conference on Acoustics, Speech and Signal Processing
Year:
2009

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Design, Optimization and Evaluation of a Dual-Radius Spherical Microphone Array

IEEE/ACM Transactions on Audio, Speech and Language Processing (TASLP)

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Abstract

We present a new method and performance data related to volumetric acoustic intensity imaging using a spherical microphone array (SMA) consisting of a dual, concentric rigid and open SMA. The dual, concentric array was designed to improve the frequency range of a standard SMA. We apply standard techniques associated with interior spherical near-field acoustic holography (NAH) and, in particular, consider issues related to the optimal use of information from both arrays for NAH projection and the advantages that thus accrue from utilising a dual, concentric SMA.