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Paper Abstract and Keywords
A numerical simulation of pathological speech production based on asymmetric vocal folds model
Hideyuki Nomura, Tetsuo Funada (Kanazawa Univ.) SP2007-43
Abstract (in Japanese) (See Japanese page) 
(in English) Numerical simulations of pathological voice production and estimations of pressure wave fluctuations are performed based on an asymmetric vocal folds model. The asymmetrical vocal folds model takes into account of asymmetries related to geometrical property (the thickness of vocal folds and a glottal half gap) and an asymmetry related to mechanical property (the effective depth of vocal fold vibration area). The effect of the asymmetry related to mechanical property on fluctuations in pressure wave is greater than these of the asymmetries related to geometrical property on fluctuations. Pathological voice production is numerically simulated through four types of pathological vocal folds models with the different conditions of paralytic symptoms. Left and right vocal folds vibrations have a phase difference. The slow time change of vocal fold vibrational amplitude is observed on a non-pathological vocal fold , as well as on a pathological vocal fold. The advance of disease increase fluctuations, in particular, an amplitude fluctuation in the pressure wave. This suggests that the estimation of amplitude fluctuation in wave is useful for the diagnosis of pathological vocal fold.
Keyword (in Japanese) (See Japanese page) 
(in English) Pathological voice / Asymmetric vocal folds model / Asymmetric vocal folds vibrations / Fluctuation / / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 165, SP2007-43, pp. 115-120, July 2007.
Paper # SP2007-43 
Date of Issue  
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee SP  
Conference Date 2007-07-26 - 2007-07-27 
Place (in Japanese) (See Japanese page) 
Place (in English) Toyama Prefectural University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Speech Production, Speech Perception, Hearing and Speech, etc. 
Paper Information
Registration To SP 
Conference Code 2007-07-SP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A numerical simulation of pathological speech production based on asymmetric vocal folds model 
Sub Title (in English)  
Keyword(1) Pathological voice  
Keyword(2) Asymmetric vocal folds model  
Keyword(3) Asymmetric vocal folds vibrations  
Keyword(4) Fluctuation  
1st Author's Name Hideyuki Nomura  
1st Author's Affiliation Kanazawa University (Kanazawa Univ.)
2nd Author's Name Tetsuo Funada  
2nd Author's Affiliation Kanazawa University (Kanazawa Univ.)
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Registration for SP 
Paper # SP2007-43 
Volume (vol) vol.107 
Number (no) no.165 
Page pp.115-120 
Date of Issue  

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