Modèles physiques et perception, contributions à l'analyse du milieu sonore urbain

Abstract : Physical world and information systems unification is a major achievement during this last decade. Communication systems, especially wireless technology, and research in physical sensors field have taken a major part in this integration.The interface between the physical word and a computer can be used in two ways. First, from a local perspective, where such a system can control for instance a single object or provide a personal assistance.Moreover, in a distributed system, this interface collects and analyses sparse data to make decisions, for instance about resource savings: to turn off streetlights, to guide to a parking spot.Wireless sensor networks are part of this second category. Thus, this thesis is focused on sound propagation simulation in urban environment, in a distributed manner.The key point of this work is a cellular representation of the city in order to model streets, gardens, ring roads, buildings, and rivers. Georeferenced image analysis, complemented by database consultation, for example to retrieve elevation data, generates this cellular model. Then, this model is converted into a system made of interconnected processes, that can reproduce many collective behaviors, whether physical or digital.We have developed a cellular automata that models sound propagation, including reflection and refraction, working on a graphics accelerator. Finally, we have produced a coupling method between observation systems by sensor networks and physical systems.
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Eloi Bandia Keita. Modèles physiques et perception, contributions à l'analyse du milieu sonore urbain. Autre [cs.OH]. Université de Bretagne occidentale - Brest, 2015. Français. ⟨NNT : 2015BRES0029⟩. ⟨tel-01596611⟩

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