Feasibility of measurement of a voice range profile with a semi-occluded vocal tract

Titze, Ingo R.; Hunter, Eric J.

doi:10.3109/14015439.2010.548828

Cited by 7 publications

(5 citation statements)

References 24 publications

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“…Björklund and Sundberg (2016) used similar "de/crescendo" protocols to study the relationship between P sg ′ and SPL, resulting in a high correlation (r = .83) over a wide range of P sg ′ values. Vocal-intensity changes have also been assessed using semioccluded-vocal-tract methods in a context of varying pitch and vowel (Titze & Hunter, 2011); note, though, that we chose to estimate P sg ′ during consonant rather than vocalic segments. The three vowel contexts (/a/, /i /, /u/) were chosen on the basis of their approximate cardinal positions on the American English vowel formant space (Hillenbrand, Getty, Clark, & Wheeler, 1995), in order to detect changes in the ACC signal that simulate the variations occurring during continuous speech production.…”

Section: Data Collectionmentioning

confidence: 99%

Estimating Subglottal Pressure From Neck-Surface Acceleration During Normal Voice Production

Fryd

Stan

Hillman

et al. 2016

J Speech Lang Hear Res

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Purpose: The purpose of this study was to evaluate the potential for estimating subglottal air pressure using a neck-surface accelerometer and to compare the accuracy of predicting subglottal air pressure relative to predicting acoustic sound pressure level (SPL). Method: Indirect estimates of subglottal pressure (P sg ′) were obtained from 10 vocally healthy speakers during loud-tosoft repetitions of 3 different /p/-vowel gestures (/pa/, /pi/, /pu/) at 3 pitch levels in the modal register. Intraoral air pressure, neck-surface acceleration, and radiated acoustic pressure were recorded, and the root-mean-square amplitude of the acceleration signal was correlated with P sg ′ and SPL.Results: The coefficient of determination between accelerometer level and P sg ′ was high when data were pooled from all vowel and pitch contexts for each participant (r 2 = .68-.93). These relationships were stronger than corresponding relationships between accelerometer level and SPL (r 2 = .46-.81). The average 95% prediction interval for estimating P sg ′ using accelerometer level was ±2.53 cm H 2 O, ranging from ±1.70 to ±3.74 cm H 2 O across participants. Conclusions: Accelerometer signal amplitude correlated more strongly with P sg ′ than with SPL. Future work is warranted to investigate the robustness of the relationship in nonmodal voice qualities, individuals with voice disorders, and accelerometerbased ambulatory monitoring of subglottal pressure.

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Section: Data Collectionmentioning

confidence: 99%

Estimating Subglottal Pressure From Neck-Surface Acceleration During Normal Voice Production

Fryd

Stan

Hillman

et al. 2016

J Speech Lang Hear Res

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“…The feedback methods described in this study will facilitate rather than complicate task completion. If a less obtrusive method for measuring aerodynamic parameters is desired, alternative techniques such as the semi-occluded vocal tract technique (10, 11) or incomplete airflow interruption (35) could be employed. Evaluating how visual or auditory feedback can be combined with these methods to increase measurement precision is warranted.…”

Section: Discussionmentioning

confidence: 99%

“…The semi-occluded vocal tract technique allows for a steady-state measurement of phonation threshold pressure that does not require valving by the lips or a mechanical shutter (10). Recent studies using this technique have recruited mostly singers and experienced voice users, as the method creates a different “feel of the voice”, which may require training sessions for subjects less familiar with voice production (11). While this method certainly has promise, it is unknown how feasible the task is for the general population.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Auditory and Visual Feedback for Airflow Interruption

et al. 2013

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Introduction Clinical application of mechanical interruption methods for measuring aerodynamic parameters has been hindered by relatively high intrasubject variability. To improve intrasubject reliability, we evaluated the effect of auditory and visual feedback on subject performance when measuring aerodynamic parameters with the airflow interrupter. Methods Eleven subjects performed four sets of ten trials with the airflow interrupter: no feedback (control); auditory feedback (tone matching subject’s F0 played over headphones); visual feedback (real-time feedback of sound pressure level, frequency, and airflow); and combined auditory and visual feedback. Task order was varied across subjects. The effect of each feedback method on mean and coefficient of variation (CV) of subglottal pressure (Ps), mean flow rate (MFR), and laryngeal airway resistance (RL; Ps/MFR) compared to control trials was determined using paired t-tests. Feedback methods were compared against each other using one-way repeated measures analysis of variance. Results Each feedback method significantly decreased the CV of RL compared to control trials (auditory: p=0.005; visual: p=0.008; combined: p<0.001). Auditory (p=0.011) and combined feedback (p=0.026) also decreased the CV of MFR. Mean MFR was significantly higher during trials with visual feedback compared to auditory feedback. Conclusions Each feedback method improved intrasubject consistency when measuring RL. Feedback appeared to have a greater effect on MFR than Ps. While there is no clear optimal feedback method, each is preferable to not providing any feedback during trials. Evaluating new methods of visual feedback to further improve MFR and thus RL measurement would be valuable.

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“…Phonation involves 100 – 220 Hz adductory vocal fold contact cycles, 12 causing low-grade, repeated stimuli. This rarely incites cough in normal physiologic circumstances, but is increasingly recognized as a trigger for cough in chronic cough patients due to a presumed upregulation of laryngeal sensory receptors.…”

Section: Introductionmentioning

confidence: 99%

Airway Hypersensitivity, Reflux, and Phonation Contribute to Chronic Cough

Francis

Slaughter

Ateş

et al. 2016

Clinical Gastroenterology and Hepatology

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Background & Aims Although chronic cough is a common, its etiology is often elusive, making patient management a challenge. Gastroesophageal reflux and airway hypersensitivity can cause chronic cough. We explored the relationship between reflux, phonation, and cough in patients with idiopathic chronic cough. Methods We performed a blinded, cross-sectional study of non-smoking patients with chronic cough (duration > 8 weeks) refractory to reflux treatment referred to the Digestive Disease Center at Vanderbilt University. All underwent 24-hour acoustic recording concurrently and temporally synchronized with ambulatory pH-impedance monitoring. Cough, phonation, and pH-impedance events were recorded. We evaluated the temporal relationship between cough and phonation or reflux events using Poisson and logistic regression. Results Seventeen patients met the inclusion criteria (88% female; 100% Caucasian; median age, 63 years and interquartile age range, 52–66 years; mean body mass index, 30.6 and interquartile range 27.9–34.0); there were 2048 analyzable coughing events. The probability of subsequent coughing increased with higher burdens of preceding cough, reflux, or phonation. Within the first 15 min after a cough event, the cough event itself was the main trigger of subsequent cough events. After this period, de novo coughing occurred with increases of 1.46-fold in association with reflux alone (95% confidence interval, 1.17–1.82; P<.001) and 1.71-fold in association with the combination of phonation and reflux events. Conclusion Antecedent phonation and reflux increased the rate of cough events in patients with idiopathic chronic cough. Reflux events were more strongly associated with increased rate of coughing. Our findings support the concept that airway hypersensitivity is a cause of chronic cough, and that the vocal folds may be an effector in chronic cough. ClinicalTrials.gov number, NCT01263626.

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Feasibility of measurement of a voice range profile with a semi-occluded vocal tract

Cited by 7 publications

References 24 publications

Estimating Subglottal Pressure From Neck-Surface Acceleration During Normal Voice Production

Estimating Subglottal Pressure From Neck-Surface Acceleration During Normal Voice Production

Evaluation of Auditory and Visual Feedback for Airflow Interruption

Airway Hypersensitivity, Reflux, and Phonation Contribute to Chronic Cough

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