Recording, processing, and analysis of digital high-speed sequences in glottography

Wittenberg, Thomas; Moser, Manfred; Tigges, Monika; Eysholdt, Ulrich

doi:10.1007/bf01213501

Cited by 69 publications

(32 citation statements)

References 5 publications

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“…Broadly, oscillatory onset involves, (1) vocal fold adductory phase of approximately 203±147ms, followed by (2) small irregular vocal fold edge oscillatory motion for a brief duration of time (80 ± 43ms) until steady-state cyclic oscillations are achieved. 12 In some instances of normal onset, small irregular vocal fold oscillatory motions are preceded by complete, 6,14,20,21 or incomplete 6,16,17,20 prephonatory glottal closure. The presence or absence of the prephonatory glottal closure is dependent on the nature of the task used to elicit the onset behavior.…”

Section: Introductionmentioning

confidence: 99%

“…8,14 Similarly, oscillatory offset is broadly characterized by (1) brief duration of non-steady state oscillatory motion, followed by (2) complete cessation of oscillatory motion and vocal fold abduction (75ms or 17±2.5 cycles). 6,10 Clearly, high temporal resolution as offered by high-speed video endoscopy 23,24 and/or videokymography 25 is required to capture these transitory oscillatory segments of the vocal folds during onset 6,12,14 and offset. 6 …”

Section: Introductionmentioning

confidence: 99%

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Oscillatory Onset and Offset in Young Vocally Healthy Adults Across Various Measurement Methods

2017

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Objective To investigate the relationship between (a) oscillatory onset/offset time across various approaches that use different measurement criteria and (b) oscillatory onset and offset times in vocally healthy young adults. Method Oscillatory onset/offset times were obtained from 71 vocally normal adults with high-speed videoendoscopy. Comparisons between the different onset methods involved measurement of the oscillatory onset time (OOT), voice initiation period (VIP), and the phonation onset method (POT) and for offset methods involved computation of the Oscillatory Offset Time (OOToff) method and the phonation offset time (POToff). Results Correlation of the OOT with the VIP was 0.240 (p = .04) & with the POT form glottal area waveform (GAW) was 0.248 (p =.04); however correlation between the VIP and POT GAW was 0.661 (p < .001). For offset there was a moderate correlation (rS = 0.503, p < 0.001) across OOToff and VOPoff. The onset time was longest for the OOT followed by the VIP and the POT. There was no correlation between onset and offset for all methods. Conclusions A framework for quantification of oscillatory onset/offset time was developed for /hi/ tasks, which can be used for future measurements of disordered voice. A positive relationship was observed between VIP & POT and between OOToff and VOPoff. There was a nonlinear relationship between the OOT and the VIP, POT measures. Onset/offset times are strongly influenced by the calculation method used, the pros and cons of which are discussed in this paper. Vibratory onset and offset represent physiologically different phenomena.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Oscillatory Onset and Offset in Young Vocally Healthy Adults Across Various Measurement Methods

2017

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“…High-speed digital imaging coupled with laser projection provides the first opportunity to quantify vocal fold motion as it relates to the kinematic activity because of increased temporal resolution and nonreliance on the estimated fundamental period to track vibratory motion. 17–19 …”

Section: Introductionmentioning

confidence: 99%

In Vivo Measurement of Pediatric Vocal Fold Motion Using Structured Light Laser Projection

et al. 2013

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Summary Objective The aim of the study was to present the development of a miniature structured light laser projection endoscope and to quantify vocal fold length and vibratory features related to impact stress of the pediatric glottis using high-speed imaging. Study Design The custom-developed laser projection system consists of a green laser with a 4-mm diameter optics module at the tip of the endoscope, projecting 20 vertical laser lines on the glottis. Measurements of absolute phonatory vocal fold length, membranous vocal fold length, peak amplitude, amplitude-to-length ratio, average closing velocity, and impact velocity were obtained in five children (6–9 years), two adult male and three adult female participants without voice disorders, and one child (10 years) with bilateral vocal fold nodules during modal phonation. Results Independent measurements made on the glottal length of a vocal fold phantom demonstrated a 0.13 mm bias error with a standard deviation of 0.23 mm, indicating adequate precision and accuracy for measuring vocal fold structures and displacement. First, in vivo measurements of amplitude-to-length ratio, peak closing velocity, and impact velocity during phonation in pediatric population and a child with vocal fold nodules are reported. Conclusion The proposed laser projection system can be used to obtain in vivo measurements of absolute length and vibratory features in children and adults. Children have large amplitude-to-length ratio compared with typically developing adults, whereas nodules result in larger peak amplitude, amplitude-to-length ratio, average closing velocity, and impact velocity compared with typically developing children.

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“…With maximum frame rate of 30 frames per second, stroboscopy is often insufficient for examining voice disorders in children, who have a fundamental frequency of greater than 255 Hz, due to lack of an adequate amount of frames per second that can be captured from children. 6,7 …”

Section: Introductionmentioning

confidence: 99%

Pediatric high speed digital imaging of vocal fold vibration: A normative pilot study of glottal closure and phase closure characteristics

Patel

Dixon

Richmond

et al. 2012

International Journal of Pediatric Otorhinolaryngology

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Objective The aim of the study is to characterize normal vibratory patterns of both glottal closure and phase closure in the pediatric population with the use of high speed digital imaging. Methods For this prospective study a total of 56 pre-pubertal children, 5–11 years (boys = 28, girls = 28) and 56 adults, 21–45 years (males = 28, females = 28) without known voice problems were examined with the use of a new technology of high speed digital imaging. Recordings were captured at 4000 frames per second for duration of 4.094 seconds at participants’ typical phonation. With semi-automated software, montage analysis of glottal cycles was performed. Three trained experienced raters, rated features of glottal configuration and phase closure from glottal cycle montages. Results Posterior glottal gap was the predominant glottal closure configuration in children (girls = 85%, boys = 68%) with normal voice. Other glottal configurations observed were: anterior gap (girls = 3.6%, boys = 0%), complete closure (girls = 7%, boys = 10%), hour glass (girls = 0%, boys = 11%). Adults with normal voice also demonstrated predominantly higher percentage of posterior glottal gap configuration (females = 75% male = 54%) compared to the configurations of anterior gap (females = 0% male = 7%), complete closure (females = 2% male = 39%), hour glass (females = 3.6% male = 3.6%). A predominantly open phase (51–70% of the glottal cycle) was observed in 86% girls and 71% boys. Compared to children, adult females showed a predominantly balance phased closure 46%, followed by open phase (39%) and predominantly closed phase (14%). Adult males showed a predominantly closed phase (43%), followed by predominantly open phase (39%), followed by a balanced phase (18%). Conclusions This is a first study investigating characteristics of normal vibratory motion in children with high speed digital imaging. Glottal configuration and phase closure for children with normal voices are distinctly different compared to adults. The results suggest that posterior glottal gap and a predominantly open phase of the glottal cycle should be considered as normal glottal configuration in children during modal pitch and loudness. This study provides preliminary information on the vibratory characteristics of children with normal voice. The data presented here may provide the bases for differentiating normal vibratory characteristics from the disordered in the pediatric population.

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Recording, processing, and analysis of digital high-speed sequences in glottography

Cited by 69 publications

References 5 publications

Oscillatory Onset and Offset in Young Vocally Healthy Adults Across Various Measurement Methods

Oscillatory Onset and Offset in Young Vocally Healthy Adults Across Various Measurement Methods

In Vivo Measurement of Pediatric Vocal Fold Motion Using Structured Light Laser Projection

Pediatric high speed digital imaging of vocal fold vibration: A normative pilot study of glottal closure and phase closure characteristics

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