Traitement et analyse de signaux sonores physiologiques : application à la phonoentérographie

Abstract : aThe goal of this research is the development of an abdominal sound analysis system. The long-term objective is a diagnostic aid system based upon phonoenterogram analysis. The first step is the study of a specifie multi-channel acquisition system. The following stage is the preprocessing : we implement an original wavelet fixed-point algorithm for the abdominal sounds detection, segmentation and denoising. A second preprocessing step introduces available a priori knowledge on physical characteristics of isolated abdominal sounds (main frequency, duration, acoustic intensity) and studies the problem of sound source localization. The extracted physical features, as well as a set of activity indexes appropriated for the global description of the phonoenterograms (number of sounds, mean energy, etc.), are used in the last processing stage, the signal analysis. The employed techniques are principal component analysis and unsupervised clustering.
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https://hal.univ-lorraine.fr/tel-01749833
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Radu Ranta. Traitement et analyse de signaux sonores physiologiques : application à la phonoentérographie. Autre. Institut National Polytechnique de Lorraine, 2003. Français. ⟨NNT : 2003INPL100N⟩. ⟨tel-01749833⟩

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