Tal Szpruch, Thibaut Carpentier, Markus Noisternig, Olivier Warusfel de l’équipe Espaces Acoustiques et Cognitifs,
présentent en anglais :

“Space-time-frequency sound processing with spherical microphone arrays”

Spherical microphone arrays (SMA) are among the most recently developed and most widely used systems for the spatiotemporal analysis of three-dimensional sound fields. Applying the Fourier Bessel expansion (FBE) the recorded sound field can be decomposed into spherical harmonics, which form a complete orthonormal set of basis functions on the two-sphere. This representation domain has many advantages for the space-time-frequency processing of acoustic wave fields.

This talk briefly summarizes the FBE theory and gives an in-depth discussion of different spherical microphone array processing methods that have been developed within the ANR project “Sample Orchestrator 2”, as for instance the analysis and re-synthesis of measured directional room impulse responses (DRIRs), the transcoding of recorded spatiotemporal sound fields to binaural and higher-order Ambisonics (HOA), and a hybrid reverberation engine using measured and feedback delay networks (FDN) that will be included into the next release of the spat~ signal processing library.

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  Le projet « Sample Orchestrator 2 (SOR2) » est financé par le programme Contenus Numériques et Interactions (CONTINT) 2010 de l’ANR.

http://sor2.ircam.fr/wordpress/