Mixed-order Ambisonics recording and playback for improving horizontal directionality

Sylvain Emmanuel Favrot, Marton Marschall, Johannes Käsbach, Jörg Buchholz, Tobias Weller

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Abstract

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 benet 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 publicationProceeding of the audio engineering society 131st convention
Publication date2011
Publication statusPublished - 2011
Event131st AES Convention - New York, NY, United States
Duration: 20 Oct 201123 Oct 2011
Conference number: 131
http://www.aes.org/events/131/

Conference

Conference131st AES Convention
Number131
CountryUnited States
CityNew York, NY
Period20/10/201123/10/2011
Internet address

Cite this

Favrot, S. E., Marschall, M., Käsbach, J., Buchholz, J., & Weller, T. (2011). Mixed-order Ambisonics recording and playback for improving horizontal directionality. In Proceeding of the audio engineering society 131st convention http://www.aes.org/events/131/