The airflow in the modeled glottal constriction was simulated by the solutions of the Navier-Stokes equations for laminar flow, and the corresponding Reynolds equations for turbulent flow in generalized, nonorthogonal coordinates using a numerical method. A two-dimensional model of laryngeal flow is considered and aerodynamic properties are calculated for both laminar and turbulent steady flows...

Despite abundant research on the distribution of glottal stops and glottalization in English and other languages, it is still unclear which factors matter most in predicting where glottal stops occur. In this study, logistic mixed-effects regression modeling is used to predict the occurrence of word-initial full glottal stops vs. no voicing irregularity. The results indicate that prominence and...

Despite abundant research on the distribution of word-initial glottal stops, it is still unclear which factors matter most in predicting where glottal stops occur and why. In this study, logistic mixed-effects regression modeling is used to predict the occurrence of word-initial full glottal stops ([P]) in an English corpus. The results indicate that prominence and phrasing are overwhelmingly t...

Analysis of high-speed digital video images showed no apparent constriction or tenseness in the larynx and glottis during the production of geminate consonants. Glottal width for geminate consonants is slightly, but not much wider than their singleton counterparts. The glottal width depends largely on consonant types. Analysis of photo-electric glottograms showed that an interruption of glottal...

Phonation models commonly rely on the assumption of a two-dimensional glottal geometry to assess kinetic and viscous flow losses. In this paper, the glottal cross-section shape is taken into account in the flow model in order to capture its influence on vocal folds oscillation. For the assessed cross-section shapes (rectangular, elliptical, or circular segment) the minimum pressure threshold en...

The pressure drop along the glottal constriction drives vocal folds self-sustained oscillations during phonation. Physical modeling of phonation is classically assessed with the glottal geometry and the subglottal pressure as known input parameters. Several studies including in-vitro validation show that simplified one-dimensional flow models allow predictions of the flow characteristics to a f...

This paper describes synthesis of English syllable-initial stopliquid and /s/-stop-liquid clusters using the HLsyn speech synthesis program. The articulo-acoustic parameters of HLsyn permit efficient synthesis of most consonant types; the parameter specifications also capture important generalizations about how related sets of consonants are produced. Here, we discuss settings of a small number...

In an unanesthetized decerebrate in situ arterially perfused brain stem preparation of mature rat, strychnine (0.05-0.2 microM) blockade of glycine receptors caused postinspiratory glottal constriction to occur earlier, shifting from early expiration to inspiration. This resulted in a paradoxical inspiratory-related narrowing of the upper airway. Stimulation of the trigeminal ethmoidal nerve (E...

This paper investigates the role of epilaryngeal constriction in constricted laryngeal gestures such as creaky voice and glottal stop. Two imaging modalities were used to study canonical phonetic productions anchored by auditory targets. Laryngeal posture was examined in axial and sagittal sections using magnetic resonance imaging, and high-speed laryngoscopic video was used to study posturing ...