Browsing by Subject "pathological speech"

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Access status: Open Access ,
Methods of deformed voice signal evaluation after larynx surgery
(Wydawnictwa AGH, 2009) Wszołek, Wiesław; Kłaczyński, Maciej
In the work has been shown from studies concerning the application of modified acoustic signal processing methods to the task of evaluation and classification of larynx surgery effects. The goal of the standard speech recognition studies is to reveal the semantic aspects of the pronounced text. In the tasks of medical diagnosis employing the speech signal analysis the semantic aspects are insignificant. The required signal characteristics should be as sensitive as possible to small deformations of the layers directly related to the voice functioning and the structure of vocal tract. The goal of the work is presentation of voice quality after various surgical treatments, performed in the ENT area. The research subject is the speech articulation process itself and all its pathological deformations, which determines both the used signal analysis tools as well as the techniques of the selected objects recognition, which are the forms of the particular ill person speech deformation forms in comparison to the speech of the whole sound people population. The evaluation has been carried out both for voice quality after larynx surgery as well as voice quality after surgical treatment of resonance cavities (nose, paranasal sinussis). The study was oriented towards the construction of systems based on the analysis of objectively registered acoustic signals of deformed speech.