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Laryngeal vibratory characteristics ...

Ahmad, Kartini.

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Laryngeal vibratory characteristics from analysis of high-speed digital images.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Laryngeal vibratory characteristics from analysis of high-speed digital images./
作者:	Ahmad, Kartini.
面頁冊數:	157 p.
附註:	Source: Dissertation Abstracts International, Volume: 66-05, Section: B, page: 2504.
Contained By:	Dissertation Abstracts International66-05B.
標題:	Health Sciences, Medicine and Surgery. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3175491
ISBN:	9780542140372

Laryngeal vibratory characteristics from analysis of high-speed digital images.
Ahmad, Kartini.

Laryngeal vibratory characteristics from analysis of high-speed digital images. - 157 p.

Source: Dissertation Abstracts International, Volume: 66-05, Section: B, page: 2504.

Thesis (Ph.D.)--The University of Wisconsin - Madison, 2005.

Studies on the relationship between vocal fold vibration and voice quality suggest that several acoustic and physiologic features may be used to differentiate voices, however, the application of the information to accurately differentiate dysphonia is still problematic. Development in high-speed digital imaging (HSDI), with the capacity to capture 2000 or more frames per second, provides scientists with a potentially practical tool to study vocal fold vibrations regardless of perturbation levels. However its clinical application is limited due to the lack of normative databases and analytical tools to process the data and extract from these images useful information.

ISBN: 9780542140372Subjects--Topical Terms:

1017756
Health Sciences, Medicine and Surgery.

Laryngeal vibratory characteristics from analysis of high-speed digital images.
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245 1 0 $a Laryngeal vibratory characteristics from analysis of high-speed digital images.
300 $a 157 p.
500 $a Source: Dissertation Abstracts International, Volume: 66-05, Section: B, page: 2504.
500 $a Supervisor: Diane M. Bless.
502 $a Thesis (Ph.D.)--The University of Wisconsin - Madison, 2005.
520 $a Studies on the relationship between vocal fold vibration and voice quality suggest that several acoustic and physiologic features may be used to differentiate voices, however, the application of the information to accurately differentiate dysphonia is still problematic. Development in high-speed digital imaging (HSDI), with the capacity to capture 2000 or more frames per second, provides scientists with a potentially practical tool to study vocal fold vibrations regardless of perturbation levels. However its clinical application is limited due to the lack of normative databases and analytical tools to process the data and extract from these images useful information.
520 $a The following studies examine vocal fold vibratory patterns using HSDI technique and image processing methods to (a) characterize these patterns according to age and gender in terms of periodicity, perturbation and open-close timing characteristics and (b) characterize dysphonic voices based on deviations from normal in terms of periodicity, perturbation and open-close timing characteristics.
520 $a The significance of this study is that it will provide a comprehensive database of vibratory patterns across age and gender, which has direct implication for assessment and management of patients with voice disorders.
520 $a Studies I, II and III investigate vocal fold vibratory patterns of simulated voice qualities such as clear, pressed, breathy, fry and hyperfunctional, and compares them to a group of normal speakers' production from different age and gender groups. Results indicate that young speakers' phonation is produced with one of four vibratory patterns within a small perturbation range, and that elderly speakers demonstrate wider variation in vibratory patterns and perturbation levels.
520 $a Study IV investigates vibratory characteristics of different voice severities to determine (a) how they deviate from normal patterns of vibrations, (b) if their vibratory characteristics reflect the degree of perceived severity and (c) if unique vibratory patterns pertaining to certain aspects of voice quality could be identified. Results indicate that perceived moderate-to-severe voices vary accordingly in terms of open-close timings and perturbation levels and that their vibratory patterns exhibit exaggeration or deviation from the normal patterns. Vibratory changes following treatment demonstrate comparative changes in the periodicity, perturbation levels and visual patterns of the Nyquist plots.
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791 $a Ph.D.
792 $a 2005
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