Mixed-order Ambisonics recording and playback for improving horizontal directionality

Sylvain Favrot*, Marton Marschall, Johannes Käsbach, Jörg Buchholz, Tobias Welle

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

14 Citations (Scopus)


Planar (2D) and periphonic (3D) higher-order Ambisonics (HOA) systems are widely used to reproduce spatial properties of acoustic scenarios. Mixed-order Ambisonics (MOA) systems combine the benefit of higher order 2D systems, i.e. a high spatial resolution over a larger usable frequency bandwidth, with a lower order 3D system to reproduce elevated sound sources. In order to record MOA signals, the location of the microphones on a hard sphere were optimized to provide a robust MOA encoding. A detailed analysis of the encoding and decoding process showed that MOA can improve both the spatial resolution in the horizontal plane and the usable frequency bandwidth for playback as well as recording. Hence the described MOA scheme provides a promising method for improving the performance of current 3D sound reproduction systems.

Original languageEnglish
Title of host publication131st Audio Engineering Society Convention 2011
Place of PublicationNew York
PublisherCurran Associates
Number of pages7
ISBN (Print)9781618393968
Publication statusPublished - 2011
Event131st Audio Engineering Society Convention 2011 - New York, NY, United States
Duration: 20 Oct 201123 Oct 2011


Other131st Audio Engineering Society Convention 2011
Country/TerritoryUnited States
CityNew York, NY


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