Pierre MASSÉ has defended in English his thesis made at Ircam, in the EAC Teams in the STMS Lab (Ircam, Sorbonne Université, CNRS, Ministère de la Culture) on Monday, February the 14th at 2.30PM.
the title is :
“Analysis, Treatment, and Manipulation Methods for Spatial Room Impulse Responses Measured with Spherical Microphone Arrays"
With the jury:
– Ville Pulkki (Aalto University), Rapporteur
- Michael Vorländer (RWTH Aachen), Rapporteur
- Roland Badeau (LTCI/Télécom Paris), Examinateur– Efren Fernandez Grande (DTU), Examinateur
– Rozenn Nicol (Orange Labs), Examinatrice- Gérard Assayag (STMS - UMR9912 - Ircam, Sorbonne Université, CNRS, Ministère de la culture), Directeur- Markus Noisternig (STMS- UMR9912 - Ircam, Sorbonne Université, CNRS, Ministère de la culture, Encadrant
You can review his thesis at: https://youtu.be/PSFyttftxA4 or at the Ircam'server MEDIAS: https://medias.ircam.fr/x42fc0a_soutenance-de-these-de-pierre-masse
The use of spatial room impulse responses (SRIR) for the reproduction of three-dimensional reverberation effects through multi-channel convolution over immersive surround-sound loudspeaker systems has become commonplace within the last few years, thanks in large part to the commercial availability of various spherical microphone arrays (SMA) as well as a constant increase in computing power. This use has in turn created a demand for analysis and treatment techniques not only capable of ensuring the faithful reproduction of the measured reverberation effect, but which could also be used to control various modifications of the SRIR in a more “creative” approach, as is often encountered in the production of immersive musical performances and installations.
Within this context, the principal objective of the current thesis is the definition of a complete space-time-frequency framework for the analysis, treatment, and manipulation of SRIRs. The analysis tools should lead to an in-depth model allowing for measurements to first be treated with respect to their inherent limitations (measurement conditions, background noise, etc.), as well as offering the ability to modify different characteristics of the final reverberation effect described by the SRIR. These characteristics can be either completely objective, even physical, or otherwise informed by knowledge of human auditory perception with regard to room acoustics.
To this end, each of the three layers (analysis, treatment, and manipulation) is thoroughly described both theoretically and in terms of its practical implementation. The first two (analysis and treatment) are then rigorously evaluated through simulated validation tests, while illustrative "proof of concept" examples of the various manipulation methods subsequently serve to demonstrate the potential capabilities of the framework on real-world SMA SRIR measurements. Ultimately, these examples also help to open the discussion as to the many directions the work completed in this thesis could then be extended.