Parametric Ambisonic Encoding using a Microphone Array with a One-plus-Three Configuration

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Conference article in proceedings
Date
2022
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Language
en
Pages
10
142-151
Series
2022 AES International Conference on Audio for Virtual and Augmented Reality
Abstract
A parametric signal-dependent method is proposed for the task of encoding a studio omnidirectional microphone signal into the Ambisonics format. This is realised by affixing three additional sensors to the surface of the cylindrical microphone casing; representing a practical solution for imparting spatial audio recording capabilities onto an otherwise non-spatial audio compliant microphone. The one-plus-three configuration and parametric encoding method were evaluated through formal listening tests using simulated sound scenes and array recordings, given a binaural decoding workflow. The results indicate that, when compared to employing first-order signals obtained linearly using an open tetrahedral array, or third-order signals derived from a 19-sensor spherical array, the proposed system is able to produce perceptually closer renderings to those obtained using ideal third-order signals.
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Publisher Copyright: © 2022 Audio Engineering Society. All rights reserved.
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Citation
McCormack, L, Gonzalez, R, Fernandez, J, Hold, C & Politis, A 2022, Parametric Ambisonic Encoding using a Microphone Array with a One-plus-Three Configuration . in 2022 AES International Conference on Audio for Virtual and Augmented Reality . Audio Engineering Society, pp. 142-151, AES International Conference on Audio for Virtual and Augmented Reality, Redmond, Washington, United States, 15/08/2022 . < https://www.aes.org/tmpFiles/elib/20221128/21846.pdf >