Comparing Phonation Threshold Flow and Pressure by Abducting Excised Larynges

Hottinger, Daniel G.; Tao, Chao; Jiang, Jack J.

doi:10.1097/mlg.0b013e3180959e38

Cited by 29 publications

(48 citation statements)

References 17 publications

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“…Because the glottal airflow can be easily noninvasively measured, it was suggested that PTF may be more practical for clinical vocal disease assessment. Experimental measurements on excised larynx setups ͑Verdolini et Hottinger et al, 2007͒ andphysical models ͑Titze et al, 1995;Chan and Titze, 2006͒ further confirmed the potential value of these phonation critical conditions on vocal disease assessment.…”

Section: Introductionsupporting

confidence: 61%

“…Then, in Sec. III, the PTP and PTF predicted by the modified onemass model are compared with experimental data reported by Chan andTitze ͑2006͒ andHottinger et al ͑2007͒. At last, we draw our conclusion.…”

Section: Introductionmentioning

confidence: 88%

“…2 and 3. The box plots are the experimental results of excised larynges reported by Hottinger et al ͑2007͒, where the boundaries of the boxes closest to zero indicate the 25th percentiles, a line within each box marks the median, the boundaries farthest from zero indicate the 75th percentile, and whiskers above and below indicate the 90th and 10th percentiles.…”

Section: Numerical Simulationmentioning

confidence: 99%

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The phonation critical condition in rectangular glottis with wide prephonatory gaps

Tao

Jiang

2008

The Journal of the Acoustical Society of America

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The effect of the pressure recovery at glottal exit is introduced to modify the one-mass model. Using the modified one-mass model, the phonation critical condition, including phonation threshold pressure and phonation threshold flow, is analyzed by using the small-amplitude oscillation theory. It is found that the phonation threshold pressure is not sensitive to the change of the prephonatory glottal width at a wide glottal gap. This result agrees with previous experimental observations and suggests that the low slope of dependence of phonation threshold pressure on prephonatory gap found by Chan and Titze [J. Acoust. Soc. Am. 119, 2351-2362 (2006)] could be a consequence of the pressure recovery effect at the glottal exit. In addition, it is predicted that the phonation threshold flow is always significantly increased with the prephonatory gap even at a wide prephonatory glottal gap. Therefore, the phonation threshold flow has an advantage in assessing the phonatory system at a wide prephonatory gap in comparison with the phonation threshold pressure. The phonation threshold flow can be a useful aerodynamic parameter for pathological conditions in which the incomplete glottal gap is often seen.

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Section: Introductionsupporting

confidence: 61%

Section: Introductionmentioning

confidence: 88%

Section: Numerical Simulationmentioning

confidence: 99%

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The phonation critical condition in rectangular glottis with wide prephonatory gaps

Tao

Jiang

2008

The Journal of the Acoustical Society of America

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“…When a polyp or nodule is present, the glottal closure is limited, thus increasing air leakage during phonation and resulting in higher-than-normal airflow measurements. 12 Previous experiments using excised canine larynges have shown PTF to increase with the size of a posterior glottal gap, 13 vocal fold elongation, 14 and surface dehydration. 15 Hottinger et al 13 determined that PTF is more sensitive than PTP to changes in posterior glottal width, demonstrating the potential value of the flow parameter in evaluating disorders that are characterized by glottal insufficiency.…”

Section: Introductionmentioning

confidence: 98%

Measurement of Phonation Threshold Power in Normal and Disordered Voice Production

Zhuang

Swinarska²,

Robieux

et al. 2013

Ann Otol Rhinol Laryngol

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Objectives Phonation threshold pressure (PTP) and phonation threshold flow (PTF) are useful aerodynamic parameters, but each is sensitive to different disorders. A single comprehensive aerodynamic parameter sensitive to a variety of disorders might be beneficial in quantitative voice assessment. We performed the first study of phonation threshold power (PTW) in human subjects. Methods PTP and PTF were measured in 100 normal subjects, 19 subjects with vocal fold immobility, and 94 subjects with a benign mass lesion. PTW was calculated from these two parameters. In 41 subjects with a polyp, measurements were obtained before and after excision. Receiver operating characteristic (ROC) analysis was used to determine the ability of the three parameters to distinguish between controls and disordered groups. Results The PTW (p < 0.001), PTP (p < 0.001), and PTF (p < 0.001) were different among the three groups. All parameters decreased after polyp excision. PTW had the highest area under the ROC curve for all analyses. Conclusions PTW is sensitive to the presence of mass lesions and vocal fold mobility disorders. Additionally, changes in PTW can be observed after excision of mass lesions. PTW could be a useful parameter to describe the aerodynamic inputs to voice production.

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“…Amongst others, work has been carried out with a strong inclination towards fluid dynamics. This includes studies investigating (a) pressure-flow relationships (Alipour et al, 1997;Hottinger et al, 2007); (b) glottal resistance Alipour and Jaiswal, 2009) and glottal efficiency (Titze, 1988); (c) velocity fields within the glottis using particle imaging velocimetry (which in simple terms corresponds to turbulence analysis) ; (d) the dependency of f o on subglottal pressure (Solomon et al, 1994;Alipour and Scherer, 2007;Alipour and Jaiswal, 2008); and (e) the relationship between subglottal pressure and non-linear dynamics of laryngeal voice production (defining the phonation instability pressure, PIP) (Jiang and Titze, 1993;Jiang et al, 2003). Further research emphasis has been directed towards connecting vocal fold motion and geometry with the acoustic signal produced: this includes, amongst others, studies investigating (a) nonlinear dynamics in relation to glottal geometry (vocal fold adduction and/or elongation) (Berry et al, 1996;Jiang et al, 2003) and vocal fold asymmetry (Giovanni et al, 1999); (b) the importance of tissue properties on phonatory characteristics (Chan and Titze, 1999;Alipour et al, 2011); (c) mucosal wave propagation on the vocal folds (Kusuyama et al, 2001;Jiang et al, 2008); and (d) the mechanical forces applying on the vocal folds during phonation (Verdolini et al, 1998;Jiang et al, 2001b;Bakhshaee et al, 2013).…”

Section: Application Of Excised Larynx Experimentation To Human Voicementioning

confidence: 99%

Excised larynx experimentation: history, current developments, and prospects for bioacoustic research

Garcia

Herbst

2018

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The study of sound production mechanisms is a crucial, yet understudied, aspect of vocal communication research in vertebrates. In excised larynx experimentation (ELE), phonation is simulated ex vivo by forcing air through a larynx specimen mounted on a laboratory bench. The method provides unique insights into vocal production and allows inference of in vivo conditions. Here, we provide a historical overview of how this technique has been implemented, from antiquity to current state-of-theart setups. We review the advances made by applying ELE to human voice and biophysics research. We then highlight the promising research output resulting from ELE in animal bioacoustics, a research field that has largely overlooked the use of this method until very recently, but is now increasingly relying on this tool. We continue by discussing the limitations of ELE, depending on the focus of investigation. Finally, we suggest how this approach should be implemented and can be applied to various research questions. We conclude by underlining the value that ELE contributes to the comprehension of human voice as well as mammalian and avian vocal communication within an interdisciplinary approach.

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Comparing Phonation Threshold Flow and Pressure by Abducting Excised Larynges

Abstract: Results showed phonation threshold flow to be more sensitive to posterior glottal width changes than phonation threshold pressure. Therefore, phonation threshold flow could be a more effective indicator than phonation threshold pressure for those vocal diseases related to abduction.

Cited by 29 publications

References 17 publications

The phonation critical condition in rectangular glottis with wide prephonatory gaps

The phonation critical condition in rectangular glottis with wide prephonatory gaps

Measurement of Phonation Threshold Power in Normal and Disordered Voice Production

Excised larynx experimentation: history, current developments, and prospects for bioacoustic research

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