Document Detail

Detecting inaudible vocal organ changes through glottal inverse filtering.
MedLine Citation:
PMID:  21724368     Owner:  NLM     Status:  MEDLINE    
The aim of this study was to investigate if there were objective quantities extracted from the speech pressure waveforms that underlay inaudible changes in the symptoms of the vocal organ. This was done through analyzing 180 voice samples obtained from nine subjects (five females and four males) before and after exposure to a placebo substance (lactose) and an organic dust substance. Acoustical analysis of the voice samples was achieved by using glottal inverse filtering. Results showed that the values of primary open quotient and primary speed quotient changed significantly (P<0.05) as did the amplitude quotient (P<0.01). Exposure to lactose resulted in significant changes of secondary open quotient (P<0.05) but opposite to effects found for exposure to organic dust. Modeling of the vocal tract into cross-sectional planes revealed that the immediate plane above the vocal folds correlates inversely with the feeling that voice is tense, or feeling the need to make an effort when speaking in addition having a feeling of shortness of breath or the need to gasp for air. Such results may point to acoustically detected subclinical changes in the vocal organ that the subject him/herself feels while they remain perceptually undetected by others.
Ahmed Geneid; Marjo Rönkkö; Risto Voutilainen; Liisa Airaksinen; Elina Toskala; Paavo Alku; Erkki Vilkman
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Publication Detail:
Type:  Journal Article     Date:  2011-07-02
Journal Detail:
Title:  Journal of voice : official journal of the Voice Foundation     Volume:  26     ISSN:  1873-4588     ISO Abbreviation:  J Voice     Publication Date:  2012 Mar 
Date Detail:
Created Date:  2012-03-12     Completed Date:  2012-07-10     Revised Date:  2013-05-02    
Medline Journal Info:
Nlm Unique ID:  8712262     Medline TA:  J Voice     Country:  United States    
Other Details:
Languages:  eng     Pagination:  154-63     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 The Voice Foundation. Published by Mosby, Inc. All rights reserved.
Department of Otolaryngology and Phoniatrics, Helsinki University Central Hospital, Helsinki, Finland.
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MeSH Terms
Diagnosis, Computer-Assisted
Dust / immunology*
Dysphonia / immunology,  physiopathology*
Glottis / physiology*
Middle Aged
Prospective Studies
Respiratory Hypersensitivity / physiopathology*
Speech Acoustics*
Reg. No./Substance:
0/Dust; 63-42-3/Lactose

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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