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Conference paper

Metrics for performance assessment of mixed-order Ambisonics spherical microphone arrays

In Proceedings of the Aes 25th Uk Conference — 2012

By Favrot, Sylvain Emmanuel1,2; Marschall, Marton1,2

From

Department of Electrical Engineering, Technical University of Denmark1

Hearing Systems, Department of Electrical Engineering, Technical University of Denmark2

Mixed-order Ambisonics (MOA) combines planar (2D) higher order Ambisonics (HOA) with lower order periphonic (3D) Ambisonics. MOA encoding from spherical microphone arrays has the potential to provide versatile recordings that can be played back using 2D, 3D or mixed systems. A procedure to generate suitable layouts for a given MOA combination order is introduced consisting of rings of microphones at several elevation angles for any given MOA combination order.

Robustness and directivity measures were evaluated for four MOA layouts. Results showed that MOA vertical directivity was similar to 3D HOA and that MOA horizontal directivity was in between the planar and periphonic order.

Language: English
Year: 2012
Proceedings: AES 25th UK CONFERENCE
Types: Conference paper
ORCIDs: Marschall, Marton

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