Spatiotemporal Quantification of Vocal Fold Vibration After Exposure to Superficial Laryngeal Dehydration: A Preliminary Study

Patel, Rita R.; Walker, Reuben; Sivasankar, Preeti M.

doi:10.1016/j.jvoice.2015.07.009

Cited by 19 publications

(21 citation statements)

References 43 publications

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“…The findings from this study provide preliminary normative references for potential early identification of voice disorders and differentiating mass lesions along the membranous vocal folds through analysis of vibratory onset and offset in children and adults. The emerging normative references provided in this study can also be useful for evaluating subtle disturbances in vibratory behavior following endocrine changes related to pre- and post-menopause, and superficial and/or systemic dehydration [56] in adults.…”

Section: Discussionmentioning

confidence: 99%

“…The rate of /hi/ production could be an additional factor influencing the onset and offset durations. One way to obtain comparable duration of /hi/ across subjects is to elicit /hi/ at target syllable per second rate with the help of a metronome [56] at a predefined syllable per second rate.…”

Section: Discussionmentioning

confidence: 99%

“…The vibratory onset time (milliseconds) was calculated as the time interval between the first visually identifiable vibratory motion and the first instance at which the amplitude periodicity [55] was within two standard deviation of the participants’ average steady state phonation value, which was calculated from the center 50% of steady oscillations [56]. Similar to vibratory onset, the vibratory offset time (milliseconds) was calculated from the total, left, and right glottal area waveforms as the time interval between the initial point at which the open quotient [57] or glottal gap index [28, 58] exceeded two standard deviations of the participants’ steady state average value and its ending at the peak of the last detectable glottal cycle.…”

Section: Methodsmentioning

confidence: 99%

“…The criteria of two standard deviations from the steady state mean value was empirically determined because any value below this threshold would have been less than 5% likely (within the 95 th percentile range of expected stead-state value) to have occurred during the steady-state phonation and was therefore considered transient onset/offset behavior. This criterion was empirically defined and was successfully implemented in a previous study [56]. The measure of open quotient was used when complete closure along the length of the vocal folds was observed.…”

Section: Methodsmentioning

confidence: 99%

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Vibratory onset and offset times in children: A laryngeal imaging study

Patel

2016

International Journal of Pediatric Otorhinolaryngology

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Objectives The aim of the study was to evaluate the differences in vibratory onset and offset times across age (adult males, adult females, and children) and waveform types (total glottal area waveform, left glottal area waveform, and right glottal area waveform) using high-speed videoendoscopy. Methods In this prospective study, vibratory onset and offset times were evaluated in a total of 86 participants. Forty-three children (23 girls, 18 boys) between 5–11 years and 43 gender matched vocally normal young adults (23 females and 18 males) in the age range (21–45 years) were recruited. Vibratory onset and offset times were calculated in milliseconds from the total, left, and right Glottal Area Waveform (GAW). A two-factor analysis of variance was used to compare the means among the subject groups (children, adult male, and adult female) and waveform type (total GAW, left GAW, right GAW) for onset and offset variables. Post hoc analyses were performed using the Fishers Least Significant Different test with Bonferroni correction for multiple comparisons. Results Children exhibited significantly shorter vibratory onset and offset times compared to adult males and females. Differences in vibratory onset and offset times were not statistically significant between adult males and females. Across all waveform types (i.e. total GAW, left GAW, and right GAW), no statistical significance was observed among the subject groups. Conclusion This is the first study reporting vibratory onset and offset times in the pediatric population. The study findings lay the foundation for the development of a large age- and gender- based database of the pediatric population to aid the study of the effects of maturation of vocal fold vibration in adulthood. The findings from this study may also provide the basis for evaluating the impact of numerous lesions on tissue pliability, and thereby has potential utility for the clinical differentiation of various lesions.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Vibratory onset and offset times in children: A laryngeal imaging study

Patel

2016

International Journal of Pediatric Otorhinolaryngology

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“…15,29,30 The closed phase prior to the instance in which the GAW reached steady state in terms of amplitude periodicity, time periodicity, and glottal closure was selected.…”

Section: Methodsmentioning

confidence: 99%

Relationship Between Acoustic Voice Onset and Offset and Selected Instances of Oscillatory Onset and Offset in Young Healthy Men and Women

2017

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Objective To investigate the relationship between (1) onset of the acoustic signal and pre-phonatory phases associated with oscillatory onset and (2) offset of the acoustic signal with the post-phonatory events associated with oscillatory offset across vocally healthy adults. Subjects and Methods High-speed videoendoscopy was captured simultaneously with the acoustic signal during repeated production of /hi.hi.hi/ at typical pitch and loudness from 56 vocally healthy adults (age 20–42 years; 21 male, 35 female). The relationship between the acoustic sound pressure signal and oscillatory onset /offset events from the glottal area waveforms (GAW), were statistically investigated using a multivariate linear regression analysis. Results The onset of the acoustic signal (X1a) is a significant predictor of the onset of first oscillations (X1g) and onset of sustained oscillations (X2g). X1a as well as gender are significant predictors of the first instance of medial contact (X1.5g). The offset of the acoustic signal (X2a) is a significant predictor of the first instance of oscillatory offset (X3g), first instance of incomplete glottal closure (X3.5g), and cessation of vocal fold motion (X4g). Conclusions The acoustic signal onset is closely related to the first medial contact of the vocal folds but the latency between these events is longer for females compared to males. The offset of the acoustic signal occurs immediately after incomplete glottal adduction. The emerging normative group latencies between the onset/offset of the acoustic and the GAW from this study appear promising for future investigations.

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Analyzing Vocal Fold Frequency Dynamics Using High‐Speed 3D Laser Video Endoscopy

Patel,

Döllinger,

Jakubaß

et al. 2024

The Laryngoscope

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ObjectiveTo examine changes in lateral and vertical vibratory motion along the anterior, middle, and posterior sections of the vocal folds, as a function of vocal frequency variations.MethodsAbsolute measurements of vocal fold surface dynamics from high‐speed videoendoscopy with custom laser endoscope were made on 23 vocally healthy adults during sustained /i:/ production at 10%, 20%, and 80% of pitch range. The 3D parameters of amplitude (mm), maximum velocity opening/closing (mm/s), and mean velocity opening/closing (mm/s) were computed for the lateral and vertical vibratory motion along the anterior, middle, and posterior sections of the vocal folds. Linear mixed model analysis was conducted to evaluate the differences in (a) vocal frequency levels (high vs. normal vs. low pitch), (b) axis level (vertical vs. lateral), (c) position level (anterior vs. middle vs. posterior), and (d) gender differences (male vs. female).ResultsOverall, the superior surface vertical motion of the vocal fold is greater compared with the lateral motion, especially in males. Along the superior surface, the mean and maximum closing velocities are greater posteriorly for low pitch. The location (anterior, middle, and posterior) along the superior surface is relevant only for vocal fold closing rather than opening, as the dynamics are different along the various locations.ConclusionsThe study highlights the significance of assessing the vertical motion of the superior surface of the vocal fold to understand the complex dynamics of voice production.Level of EvidenceNA Laryngoscope, 2024

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Spatiotemporal Quantification of Vocal Fold Vibration After Exposure to Superficial Laryngeal Dehydration: A Preliminary Study

Cited by 19 publications

References 43 publications

Vibratory onset and offset times in children: A laryngeal imaging study

Vibratory onset and offset times in children: A laryngeal imaging study

Relationship Between Acoustic Voice Onset and Offset and Selected Instances of Oscillatory Onset and Offset in Young Healthy Men and Women

Analyzing Vocal Fold Frequency Dynamics Using High‐Speed 3D Laser Video Endoscopy

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