Arşiv ve Dokümantasyon Merkezi
Dijital Arşivi

Voice conversion for reconstruction of dysphonic speech

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dc.contributor Graduate Program in Electrical and Electronic Engineering.
dc.contributor.advisor Arslan, Levent M.
dc.contributor.author Tarakcıoğlu, Gönenç Seçil.
dc.date.accessioned 2023-03-16T10:17:32Z
dc.date.available 2023-03-16T10:17:32Z
dc.date.issued 2010.
dc.identifier.other EE 2010 T37
dc.identifier.uri http://digitalarchive.boun.edu.tr/handle/123456789/12775
dc.description.abstract The medical term "dysphonia" is used for voice disorders caused by functional impairment of voice organs which results in inadequate oscillatory movement of the vocal folds. Dysphonic speech is typically hoarse, rough and breathy with very weak phonation or with no phonation in severe examples (for instance, after total laryngectomy). Although there are speech therapy techniques as well as surgical and post-surgical rehabilitation methods practiced in medicine, a complete restoration of dysphonic speech is usually not possible with none of these elements. This study addresses this specific problem and aims to computationally repair the voice source and vocal tract anomalies of dysphonic speech. The system proposed hereby builds upon the Source-Filter Speech Model and approaches the task twofoldedly: (i) Voice source repair involves substituting the missing glottal excitation and feeding it to the vocal tract filter according to the linear prediction equation. (ii) Vocal tract repair algorithm makes use of Voice Conversion principles and focuses on replacing the dysphonic speech parameters with those of normal speech. The performance evaluations have shown the developed reconstruction system to succeed in imitating some characteristics of normal speech, yet remarkable improvements cannot be achieved perceptually in terms of naturalness.
dc.format.extent 30cm.
dc.publisher Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2010.
dc.relation Includes appendices.
dc.relation Includes appendices.
dc.subject.lcsh Voice disorders.
dc.title Voice conversion for reconstruction of dysphonic speech
dc.format.pages xiii, 46 leaves ;


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