scholarly journals A model for vocal fold vibratory motion, contact area, and the electroglottogram

1986 ◽  
Vol 80 (5) ◽  
pp. 1309-1320 ◽  
Author(s):  
D. G. Childers ◽  
D. M. Hicks ◽  
G. P. Moore ◽  
Y. A. Alsaka
Keyword(s):  
Contact Area ◽  
Vocal Fold ◽  
Vibratory Motion

Monitoring Vocal Fold Abduction through Vocal Fold Contact Area

1988 ◽  
Vol 31 (3) ◽  
pp. 338-351 ◽  
Author(s):  
Martin Rothenberg ◽  
James J. Mahshie
Keyword(s):  
Contact Area ◽  
Time Variation ◽  
Vocal Fold ◽  
Thyroid Cartilage ◽  
Electrical Conductance ◽  
Vocal Folds ◽  
Linear Phase ◽  
Voice Production ◽  
Voiced Speech ◽  
High Pass

A number of commercial devices for measuring the transverse electrical conductance of the thyroid cartilage produce waveforms that can be useful for monitoring movements within the larynx during voice production, especially movements that are closely related to the time-variation of the contact between the vocal folds as they vibrate. This paper compares the various approaches that can be used to apply such a device, usually referred to as an electroglottograph, to the problem of monitoring the time-variation of vocal fold abduction and adduction during voiced speech. One method, in which a measure of relative vocal fold abduction is derived from the duty cycle of the linear-phase high pass filtered electroglottograph waveform, is developed in detail.

scholarly journals Relationship Between the Electroglottographic Signal and Vocal Fold Contact Area

2016 ◽  
Vol 30 (2) ◽  
pp. 161-171 ◽  
Author(s):  
Vít Hampala ◽  
Maxime Garcia ◽  
Jan G. Švec ◽  
Ronald C. Scherer ◽  
Christian T. Herbst
Keyword(s):  
Contact Area ◽  
Vocal Fold

Measuring contact area in synthetic vocal fold replicas using electrical resistance

2016 ◽  
Vol 139 (4) ◽  
pp. 2221-2221
Author(s):  
Kyle L. Syndergaard ◽  
Stephen Warner ◽  
Shelby Dushku ◽  
Scott L. Thomson
Keyword(s):  
Contact Area ◽  
Electrical Resistance ◽  
Vocal Fold

scholarly journals Characterizing Vibratory Kinematics in Children and Adults With High-Speed Digital Imaging

2014 ◽  
Vol 57 (2) ◽  
Author(s):  
Rita Patel ◽  
Denis Dubrovskiy ◽  
Michael Döllinger
Keyword(s):  
Digital Imaging ◽  
Vocal Fold ◽  
High Speed ◽  
Vocal Folds ◽  
Mean Amplitude ◽  
Mean Values ◽  
Vibratory Motion ◽  
Source Mechanisms ◽  
Time Periodicity ◽  
Phase Asymmetry

PurposeThe aim of this study is to quantify and identify characteristic vibratory motion in typically developing prepubertal children and young adults using high-speed digital imaging.MethodThe vibrations of the vocal folds were recorded from 27 children (ages 5–9 years) and 35 adults (ages 21–45 years), with high speed at 4,000 frames per second for sustained phonation. Kinematic features of amplitude periodicity, time periodicity, phase asymmetry, spatial symmetry, and glottal gap index were analyzed from the glottal area waveform across mean and standard deviation (i.e., intercycle variability) for each measure.ResultsChildren exhibited lower mean amplitude periodicity compared to men and women and lower time periodicity compared to men. Children and women exhibited greater variability in amplitude periodicity, time periodicity, phase asymmetry, and glottal gap index compared to men. Women had lower mean values of amplitude periodicity and time periodicity compared to men.ConclusionChildren differed both spatially but more temporally in vocal fold motion, suggesting the need for the development of children-specific kinematic norms. Results suggest more uncontrolled vibratory motion in children, reflecting changes in the vocal fold layered structure and aero-acoustic source mechanisms.

scholarly journals Vocal fold contact area

1987 ◽  
Vol 81 (S1) ◽  
pp. S37-S37 ◽  
Author(s):  
Ingo R. Titze ◽  
David Druker ◽  
Paul Durham
Keyword(s):  
Contact Area ◽  
Vocal Fold

Laryngograph as a Measure of Vocal Fold Contact Area

1984 ◽  
Vol 27 (2) ◽  
pp. 178-182 ◽  
Author(s):  
H. R. Gilbert ◽  
Charles R. Potter ◽  
Ronald Hoodin
Keyword(s):  
High Resistance ◽  
Contact Area ◽  
Vocal Fold ◽  
Stop Consonant ◽  
Vocal Folds ◽  
Pressure Waveform ◽  
Additional Information ◽  
Subglottal Pressure ◽  
Vocal Effort

The present investigation sought to provide additional information concerning the laryngograph as a means to study vocal fold contact area. Subglottal pressures were sensed simultaneously with the laryngographic signal while the speaker produced a variety of speech tasks. The onset and cessation of the subglottal pressure waveform was studied relative to the laryngographic and speech waveforms. Differences were noted for voiced-voiceless contrasts for bilabial stop consonant production and vocal effort changes during the three vowels studied. Also a high-resistance polymer strip was placed between the vocal folds and gradually removed while simultaneous laryngographic recordings were obtained during sustained productions of the vowel/Δ/. An increase in the amplitude of the laryngographie waveform upon withdrawal of the polymer strip strongly supported the concept that the laryngographic signal is generated directly by the change in conductance due to alterations in the area of vocal fold contact.

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