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Design and Limitations of Non-Coincidence Correction Filters for Soundfield Microphones

The tetrahedral microphone capsule arrangement in a Soundfield microphone captures a so-called A-format signal which is then converted to a corresponding B-format signal. The phase differences between the A-format signal channels due to non-coincidence of the microphone capsules cause errors in the corresponding B-format signals and linear combinations thereof. Various strategies for designing B-format non-coincidence correction filters are compared and limitations are discussed.

Authors: Faller, Christof; Kolundzija, Mihailo
Affiliations: Illusonic LLC, Lausanne, Switzerland; Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland(See document for exact affiliation information.)
AES Convention:126 (May 2009) Paper Number:7766 Import into BibTeX
Subject:Spatial Rendering

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