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A Preliminary Study for a Slantwise-Placed Electroglottography.
MedLine Citation:
PMID:  25444155     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
OBJECTIVE: Slantwise-placed electroglottography (EGG) was proposed for synchronous use with an ultrasound machine in a previous work. The objective was to confirm the feasibility of this slant EGG, differentiate it from conventional EGG, and give suggestions for its applications.
STUDY DESIGN AND METHODS: A synchronized system composed of an EGG device, a high-speed video, a sound level meter, and a headset was established. The same phonation conditions were acquired by training subjects to reach the target phonation frequency and intensity. Electrode position was designed, and vocal fold vibration parameters were measured from EGG waveforms recorded in each electrode position.
RESULTS: Comparison showed that the characteristic points identified in slant EGG waveforms were consistent with the vibration phase shown by high-speed video images. Phonation frequency measured from slant EGG was highly accurate. EGG amplitude nonlinearly decreased with the increase of electrode distance. Compared with conventional EGG parameters, velocity ratio and glottal closed quotient measured from slant EGG were accurate when electrodes were placed symmetrically and the electrode distance was within a proper length.
CONCLUSIONS: Slant EGG was proved feasible and can be considered as a useful tool to obtain comprehensive information in investigating the in vivo vocal fold dynamics when synchronized with other detecting equipment.
Authors:
Shanshan Tang; Cong Zhang; Supin Wang; Mingxi Wan
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-11-28
Journal Detail:
Title:  Journal of voice : official journal of the Voice Foundation     Volume:  -     ISSN:  1873-4588     ISO Abbreviation:  J Voice     Publication Date:  2014 Nov 
Date Detail:
Created Date:  2014-12-2     Completed Date:  -     Revised Date:  2014-12-3    
Medline Journal Info:
Nlm Unique ID:  8712262     Medline TA:  J Voice     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2014 The Voice Foundation. Published by Elsevier Inc. All rights reserved.
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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