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Phonation threshold flow measurements in normal and pathological
Phonation Threshold Flow Measurements in. Normal and Pathological Phonation . Peiyun Zhuang, MD; Alicia J. Sprecher; Matthew R. Hoffman; Yi Zhang, MD; ...
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Introduction. Phonation Threshold Flow Measurements in. Normal ... function and could differentiate between normal and pathological voices. Methods: The Kay ...
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Phonation threshold pressure and flow in excised human larynges
less variability than onset measurements (P ¼ .012 for PTP, P ¼ .0001 for PTF). Conclusions: ... Key Words: Phonation threshold pressure, phonation threshold flow, excised larynx, hysteresis, vocal fold. ... PTP is increased by vocal fold pathology such as dehy- ..... in a series of normal human subjects (mean, 0.06 L/s ).21.
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Effects of Surgery on the Phonation Threshold Pressure in Patients
3 Phonation threshold pressure (PTP) is a special kind of subglottal pressure. .... AC = accelerometer; PS = pressure sensor; AM = air- flow meter; M = microphone . .... 9 The subglottal pressure during normal phonation is divided into two ..... Spatiotemporal analysis of normal and pathological human vocal fold vibrations.
[ 1-s2.0-S0929664610600228-main.pdf?_tid=0dc235fe-d8c5-11e3-ac71-00000aab0f27&acdnat=1399782840_af95502bfd29fd246a2d5e68a6d184c9 - Read/Download File

A numerical and analytical study of phonation threshold pressure
1.12 Phonation threshold pressure of the physical model as function of prephonatory ... vocal tract transform the flow pulses into meaningful speech sounds. A schematic of the anatomy ... is an important measure of vocal health after surgurical intervention and when attempting ..... both normal and pathological phonation.
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Assessment of Voice and Respiratory Function - Springer
Have the changes returned the voice to normal func- tion as indicated by .... any kind of perceived voice pathology. .... measurement of the phonation threshold pressure. (PTP) ... obstruction of the upper airway, inspiratory and expiratory flow.
[ 9783540791355-c1.pdf?SGWID=0-0-45-1111577-p173819206 - Read/Download File

Mechanism of and Threshold Biomechanical Conditions for - Plos
Mar 1, 2011 ... demonstrated that a convective acceleration of a flow induced by rapid ...... Phonation threshold flow measurements in normal and pathological ...
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Voice assessment: updates on perceptual, acoustic - MIT
pressures and glottal air flow rates during voicing, and endoscopic imaging of ... Aerodynamic assessment: New devices for measuring phonation threshold air pressures and air ... into the mechanisms of normal and disordered voice production. Summary .... pathological voices) than the measures currently being used for ...
[ MehtaCurrOpOtoHNS2008 Voice assessment--updates on perceptual, acoustic, aerodynamic, and endoscopic imaging methods.pdf - Read/Download File

Cepstral- and Spectral-Based Acoustic Measures of Normal Voices
Cepstral Peak Prominence (CPP) values for speakers with normal voices. ... Acoustic instrumental measurements have been proposed as .... The Bernoulli effect states that given a constant volume flow of air or a fluid in a ... laryngeal resistance, and/or failure to achieve phonation threshold pressure ..... The pathological.
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Collision Threshold Pressure: A novel measure of voice - DiVA
2.2 Measurement of phonation and collision threshold pressures .... Effects on vocal fold collision and phonation threshold pressure of resonance ..... flow across the vocal organs (trachea, larynx and pharynx), of which he supposed the ...... Good-quality male speaking voices, as opposed to normal and pathological voices,.
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Breathy voice: Using Praat scripting to determine the intensity
In this paper we will investigate the process of normal phonation, examine the ... methods that have been proposed to acoustically measure breathiness, ... specifically its clinical implications in speech language pathology as .... For a breathy vowel, there is increased flow throughout the ... pass the phonation threshold (2) to.
[ ShainaSelbig-2011-Breathy voice- Using Praat scripting to determine the intensity difference of H1-H2.pdf - Read/Download File

2012_Abstracts - The Voice Foundation
Measurement of Ps is essential for calculating laryngeal resistance (RL), ... mean flow rate (MFR), Ps, and RL were calculated for each subject and condition. .... phonatory behavior, gender and pathology, which influence the HSV speed requirements. .... Collision threshold pressure (CTP) is defined as the lowest subglottal ...
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Data on subglottal pressure and SPL at varied vocal loudness and
Dept of Speech Pathology, Danderyd Hospital, S-182 88 Danderyd, Sweden. Abstract. Phonation threshold pressure has been defined as the minimum subglottal ... At normal loudness and habitual pitch, the SPL values were similar .... phonation were measured in 4 subjects, two of ..... Vocal intensity and air flow rate.
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Data on subglottal pressure and SPL at varied vocal loudness - KTH
Dept of Speech Pathology, Danderyd Hospital, S-182 88 Danderyd, Sweden. Abstract. Phonation threshold pressure has been defined as the minimum subglottal ... At normal loudness and habitual pitch, the SPL values were similar .... phonation were measured in 4 subjects, two of ..... Vocal intensity and air flow rate.
[ 1996_37_4_027-036.pdf - Read/Download File

Computational Modeling of Phonatory Dynamics in a Tubular Three
Simulation of phonation associated flow-structure interaction has been conducted in ... features of phonation for normal as well as tension-imbalanced vocal folds, such .... the vocal tract axis to form a 23.5° anterior angle, which is measured from the ..... and might perhaps even increase the threshold pressure for phonation.
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Regulation of glottal closure and airflow in a three-dimensional
tal opening and a mean glottal flow rate typical of human phonation can be ... thus lowers the phonation threshold pressure, making it eas- ... low flow rate is one of the posturing goals of normal voice ... rate is often an indication of pathological changes that pre- .... and experimental measurement (Chhetri et al., 2011).
[ 2015JASA02.pdf - Read/Download File

Restraining mechanisms in regulating glottal closure during phonation
and thus lowers phonation threshold pressure (Titze, 1988;. Zhang et al., 2007; Zhang, ..... occur in normal and pathological phonation. It was further assumed in  ...
[ 2011JASA12.pdf - Read/Download File

Vocal fold and ventricular fold vibration in period-doubling phonation
May 25, 2010 ... of the vocal folds and the ventricular folds during phonation produced by a professional singer ... The in vivo measurements of the glottal aperture are then compared to the simulated ... ger Borch et al., 2004), pathological phonation ( Lindestad ... fold closure coincides with a decrease in glottal-flow ampli-.
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Whisper and Phonation - OhioLINK Electronic Theses and
Flow typically was higher for whisper than phonation (except for ... Results relative to adduction: Ps increased from normal to breathy to pressed at each level ..... pathological vocal phenomena, such as aphonia and vocal fold paralysis. Also ... respiratory capacity, as given by measurements for air pressures, airflow, and air ...
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Effects of voice training on phonetograms and maximum phonation
fundamental frequencies beyond pitches used in normal speech is not practiced. ... pathology, correcting pathogenic voicing patterns, as well as optimizing the ... consisting of phonetography and measuring phonation times, was repeated. ... originates from a completely relaxed larynx and vocal tract, where the air flows.
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