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Spatio-temporal quantification of vocal fold vibrations using high-speed videoendoscopy and a biomechanical model

Schwarz, Raphael ; Döllinger, Michael ; Wurzbacher, Tobias ; Eysholdt, Ulrich ; Lohscheller, Jörg

The Journal of the Acoustical Society of America, 2008-05, Vol.123 (5), p.2717-2732 [Periódico revisado por pares]

Woodbury, NY: Acoustical Society of America

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Título:
Spatio-temporal quantification of vocal fold vibrations using high-speed videoendoscopy and a biomechanical model
Autor: Schwarz, Raphael ; Döllinger, Michael ; Wurzbacher, Tobias ; Eysholdt, Ulrich ; Lohscheller, Jörg
Assuntos: Algorithms ; Biological and medical sciences ; Biomechanical Phenomena ; Ear and associated structures. Auditory pathways and centers. Hearing. Vocal organ. Phonation. Sound production. Echolocation ; Endoscopy ; Fundamental and applied biological sciences. Psychology ; Glottis - anatomy & histology ; Glottis - physiology ; Humans ; Models, Biological ; Oscillometry ; Photography ; Vertebrates: nervous system and sense organs ; Vibration ; Vocal Cords - anatomy & histology ; Vocal Cords - physiology ; Voice
É parte de: The Journal of the Acoustical Society of America, 2008-05, Vol.123 (5), p.2717-2732
Notas: ObjectType-Article-2
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Descrição: Pathologic changes within the organic constitution of vocal folds or a functional impairment of the larynx may result in disturbed or even irregular vocal fold vibrations. The consequences are perturbations of the acoustic speech signal which are perceived as a hoarse voice. By means of appropriate image processing techniques, the vocal fold dynamics are extracted from digital high-speed videos. This study addresses the approach to obtain a parametric description of the spatio-temporal characteristics of the vocal fold oscillations for the aim of classification. For this purpose a biomechanical vocal fold model is introduced. An automatic optimization procedure is developed for fitting the model dynamics to the observed vocal fold oscillations. Thus, the resulting parameter values represent a specific vibration pattern and serve as an objective quantification measure. Performance and reliability of the optimization procedure are validated with synthetically generated data sets. The high-speed videos of two normal voice subjects and six patients suffering from different voice disorders are processed. The resulting model parameters represent a rough approximation of physiological parameters along the entire vocal folds.
Editor: Woodbury, NY: Acoustical Society of America
Idioma: Inglês

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Spatio-temporal quantification of vocal fold vibrations using high-speed videoendoscopy and a biomechanical model

Schwarz, Raphael ; Döllinger, Michael ; Wurzbacher, Tobias ; Eysholdt, Ulrich ; Lohscheller, Jörg

Woodbury, NY: Acoustical Society of America

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