The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Serrurier Antoine - One of the best experts on this subject based on the ideXlab platform.
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Modélisation tridimensionnelle des organes de la parole à partir d'images IRM pour la production de nasales - Caractérisation articulatori-acoustique des mouvements du voile du palais.
HAL CCSD, 2006Co-Authors: Serrurier AntoineAbstract:The goal of this work was the articulatory-acoustic characterization of Nasality: the nature of velopharyngeal port movement and associated acoustic characteristics. The building of a 3D linear single-subject articulatory model of the nasal tract from MRI and CT images revealed two degrees of freedom for the movements of the velum and nasopharyngeal wall. The dominant parameter corresponds to a joint vertical oblique movement of the velum and a horizontal movement of the pharyngeal wall, expressing the sphincter effect of the velopharyngeal port. The second parameter corresponds to a smaller movement of the velum, significantly modifying the nasal coupling area. The space covered by the model's movements corresponds precisely to that described by a velum point measured by electromagnetic articulography. Realistic area functions of the nasal tract derived from the model allowed us to determine acoustic transfer functions for seven vowels and the acoustic influence of velar movements.Ce travail a pour objectif la caractérisation articulatori-acoustique de la nasalité: nature des mouvements du port vélopharyngé, caractéristiques acoustiques liées. La construction d'un modèle articulatoire linéaire 3D monosujet du conduit nasal à partir d'images IRM et CT a fait émerger deux degrés de liberté parmi les mouvements du voile du palais et de la paroi nasopharyngée. Le premier, prédominant, correspond à un mouvement conjoint vertical oblique du voile et horizontal de la paroi pharyngée, traduisant l'effet de sphincter du port vélopharyngé, et le second à un petit mouvement horizontal du voile seul, modifiant sensiblement l'aire de couplage nasal. L'espace des mouvements du modèle décrit exactement celui d'un point du voile obtenu par articulographie électromagnétique. Les fonctions d'aire réalistes du conduit nasal déduites du modèle ont permis de déterminer les fonctions de transfert acoustiques de sept voyelles et l'influence acoustique des mouvements du voile
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Modélisation tridimensionnelle des organes de la parole à partir d'images IRM pour la production de nasales (caractérisation articulatori-acoustique des mouvements du voile du palais)
2006Co-Authors: Serrurier Antoine, Badin PierreAbstract:Ce travail a pour objectif la caractérisation articulatori-acoustique de la nasalité: nature des mouvements du port vélopharyngé, caractéristiques acoustiques liées. La construction d'un modèle articulatoire linéaire 3D monosujet du conduit nasal à partir d'images IRM et CT a fait émerger deux degrés de liberté parmi les mouvements du voile du palais et de la paroi nasopharyngée. Le premier, prédominant, correspond à un mouvement conjoint vertical oblique du voile et horizontal de la paroi pharyngée, traduisant l'effet de sphincter du port vélopharyngé, et le second à un petit mouvement horizontal du voile seul, modifiant sensiblement l'aire de couplage nasal. L'espace des mouvements du modèle décrit exactement celui d'un point du voile obtenu par articulographie électromagnétique. Les fonctions d'aire réalistes du conduit nasal déduites du modèle ont permis de déterminer les fonctions de transfert acoustiques de sept voyelles et l'influence acoustique des mouvements du voile.The goal of this work was the articulatory-acoustic characterization of Nasality: the nature of velopharyngeal port movement and associated acoustic characteristics. The building of a 3D linear single-subject articulatory model of the nasal tract from MRI and CT images revealed two degrees of freedom for the movements of the velum and nasopharyngeal wall. The dominant parameter corresponds to a joint vertical oblique movement of the velum and a horizontal movement of the pharyngeal wall, expressing the sphincter effect of the velopharyngeal port. The second parameter corresponds to a smaller movement of the velum, significantly modifying the nasal coupling area. The space covered by the model's movements corresponds precisely to that described by a velum point measured by electromagnetic articulography. Realistic area functions of the nasal tract derived from the model allowed us to determine acoustic transfer functions for seven vowels and the acoustic influence of velar movements.GRENOBLE1-BU Sciences (384212103) / SudocSudocFranceF
Jonathan M. Liss - One of the best experts on this subject based on the ideXlab platform.
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a comparison of equal appearing interval scaling and direct magnitude estimation of nasal voice quality
Journal of Speech Language and Hearing Research, 2000Co-Authors: Richard I. Zraick, Jonathan M. LissAbstract:Listeners rated the Nasality of synthesized vowels using two psychophysical scaling methods (equal-appearing interval scaling and direct magnitude estimation). A curvilinear relationship between equal-appearing interval ratings and direct magnitude estimations of Nasality indicated that Nasality is a prothetic rather than metathetic dimension. It also was shown that the use of direct magnitude estimation results in Nasality ratings that are more consistent and reliable. The results of this experiment are discussed in relation to other studies that have examined the validity and reliability of equal-appearing interval scaling of voice quality. Additionally, there is a discussion of methodological issues for future research and the implications of the findings for clinical and research purposes.
Badin Pierre - One of the best experts on this subject based on the ideXlab platform.
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Modélisation tridimensionnelle des organes de la parole à partir d'images IRM pour la production de nasales (caractérisation articulatori-acoustique des mouvements du voile du palais)
2006Co-Authors: Serrurier Antoine, Badin PierreAbstract:Ce travail a pour objectif la caractérisation articulatori-acoustique de la nasalité: nature des mouvements du port vélopharyngé, caractéristiques acoustiques liées. La construction d'un modèle articulatoire linéaire 3D monosujet du conduit nasal à partir d'images IRM et CT a fait émerger deux degrés de liberté parmi les mouvements du voile du palais et de la paroi nasopharyngée. Le premier, prédominant, correspond à un mouvement conjoint vertical oblique du voile et horizontal de la paroi pharyngée, traduisant l'effet de sphincter du port vélopharyngé, et le second à un petit mouvement horizontal du voile seul, modifiant sensiblement l'aire de couplage nasal. L'espace des mouvements du modèle décrit exactement celui d'un point du voile obtenu par articulographie électromagnétique. Les fonctions d'aire réalistes du conduit nasal déduites du modèle ont permis de déterminer les fonctions de transfert acoustiques de sept voyelles et l'influence acoustique des mouvements du voile.The goal of this work was the articulatory-acoustic characterization of Nasality: the nature of velopharyngeal port movement and associated acoustic characteristics. The building of a 3D linear single-subject articulatory model of the nasal tract from MRI and CT images revealed two degrees of freedom for the movements of the velum and nasopharyngeal wall. The dominant parameter corresponds to a joint vertical oblique movement of the velum and a horizontal movement of the pharyngeal wall, expressing the sphincter effect of the velopharyngeal port. The second parameter corresponds to a smaller movement of the velum, significantly modifying the nasal coupling area. The space covered by the model's movements corresponds precisely to that described by a velum point measured by electromagnetic articulography. Realistic area functions of the nasal tract derived from the model allowed us to determine acoustic transfer functions for seven vowels and the acoustic influence of velar movements.GRENOBLE1-BU Sciences (384212103) / SudocSudocFranceF
Richard I. Zraick - One of the best experts on this subject based on the ideXlab platform.
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a comparison of equal appearing interval scaling and direct magnitude estimation of nasal voice quality
Journal of Speech Language and Hearing Research, 2000Co-Authors: Richard I. Zraick, Jonathan M. LissAbstract:Listeners rated the Nasality of synthesized vowels using two psychophysical scaling methods (equal-appearing interval scaling and direct magnitude estimation). A curvilinear relationship between equal-appearing interval ratings and direct magnitude estimations of Nasality indicated that Nasality is a prothetic rather than metathetic dimension. It also was shown that the use of direct magnitude estimation results in Nasality ratings that are more consistent and reliable. The results of this experiment are discussed in relation to other studies that have examined the validity and reliability of equal-appearing interval scaling of voice quality. Additionally, there is a discussion of methodological issues for future research and the implications of the findings for clinical and research purposes.
Thomas Watterson - One of the best experts on this subject based on the ideXlab platform.
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perceptual anchors and the dispersion of Nasality ratings
The Cleft Palate-Craniofacial Journal, 2017Co-Authors: Kristine E Galek, Thomas WattersonAbstract:Objective: This investigation studied the effects of perceptual anchors on the dispersion and reliability of listener ratings of Nasality. Design: Listeners (N = 129) were assigned to one of six listening groups. Each group rated Nasality independently for 100 speech samples on a seven-point scale that ranged from 1 = normal Nasality to 7 = severe hyperNasality. The anchors used were examples of a 1, 3, 4, 5, and/or 7 on the rating scale. These anchors were played selectively to group 2 (4), group 3 (1 and 7), group 4 (3 and 5), group 5 (1, 4, 7), and group 6 (7). Group 1 had no anchor. Participants: Of the speakers, 95 were children followed by a craniofacial team and five were children without histories of speech disorders. Main Outcome Measures: The outcome measures were 12,900 ratings of Nasality on a seven-point scale. Results: Q values showed that group 5, which was the only group to receive three anchors, had the lowest, or best, Q value (0.78), and group 1 (no anchor) had the highest, or wors...
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reliability and validity of Nasality ratings between a monolingual and bilingual listener for speech samples from english spanish speaking children
Folia Phoniatrica Et Logopaedica, 2013Co-Authors: Thomas Watterson, Kerry E Lewis, Tanna Murdock, Kelly Nett CorderoAbstract:Objective: This study sought to determine if a monolingual English listener could rate Nasality in English and in Spanish with the same proficiency as a bilingual
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the relationship between nasalance scores and Nasality ratings obtained with equal appearing interval and direct magnitude estimation scaling methods
The Cleft Palate-Craniofacial Journal, 2010Co-Authors: Tami U Brancamp, Kerry E Lewis, Thomas WattersonAbstract:Abstract Objectives: To assess the nasalance/Nasality relationship and Nasometer test sensitivity and specificity when Nasality ratings are obtained with both equal appearing interval (EAI) and direct magnitude estimation (DME) scaling procedures. To test the linearity of the relationship between Nasality ratings obtained from different perceptual scales. Stimuli: Audio recordings of the Turtle Passage. Design: Participants' nasalance scores and audio recordings were obtained simultaneously. A single judge rated the samples for Nasality using both EAI and DME scaling procedures. Participants: Thirty-nine participants 3 to 17 years of age. Across participants, resonance ranged from normal to severely hypernasal. Main Outcome Measures: Nasalance scores and two Nasality ratings. Results: The magnitude of the correlation between nasalance scores and EAI ratings of Nasality (r = .63) and between nasalance and DME ratings of Nasality (r = .59) was not significantly different. Nasometer test sensitivity and ...
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the influence of listener experience and academic training on ratings of Nasality
Journal of Communication Disorders, 2003Co-Authors: Kerry E Lewis, Thomas Watterson, Sarah M HoughtonAbstract:Abstract This study assessed listener agreement levels for Nasality ratings, and the strength of relationship between Nasality ratings and nasalance scores on one hand, and listener clinical experience and formal academic training in cleft palate speech on the other. The listeners were 12 adults who represented four levels of clinical experience and academic training in cleft palate speech. Three listeners were teachers with no clinical experience and no academic training (TR), three were graduate students in speech-language pathology (GS) with academic training but no clinical experience, three were craniofacial surgeons (MD) with extensive experience listening to cleft palate speech but with no academic training in speech disorders, and three were certified speech-language pathologists (SLP) with both extensive academic training and clinical experience. The speech samples were audio recordings from 20 persons representing a range of Nasality from normal to severely hypernasal. Nasalance scores were obtained simultaneously with the audio recordings. Results revealed that agreement levels for Nasality ratings were highest for the SLPs, followed by the MDs. Thus, the more experienced groups tended to be more reliable. Mean Nasality ratings obtained for each of the rater groups revealed an inverse relationship with experience. That is, the two groups with clinical experience (SLP and MD) tended to rate Nasality lower than the two groups without experience (GS and TR). Correlation coefficients between nasalance scores and Nasality judgments were low to moderate for all groups and did not follow a pattern. Educational outcomes As a result of this activity, the reader will be able to (1) describe the influence of listener experience and academic training in cleft palate speech on perceptual ratings of Nasality. (2) describe the influence of experience and training on the Nasality/nasalance relationship and, (3) compare the present findings to previous findings reported in the literature.
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nasalance and Nasality in low pressure and high pressure speech
The Cleft Palate-Craniofacial Journal, 1998Co-Authors: Thomas Watterson, Kerry E Lewis, Candace DeutschAbstract:Abstract Objective: This study compared nasalance measures and Nasality ratings in low pressure (LP) and high pressure (HP) speech. Subjects: The subjects for this study were 25 children ranging in age from 5 to 13 years. Twenty of the subjects were patients followed by a craniofacial team, and five had no history of communication disorder. Results: The mean nasalance for the LP speech was 29.98% (SD, 16.16), and the mean nasalance for the HP speech was 30.28% (SD, 15.35). The mean Nasality rating for the LP speech was 2.31, and the mean Nasality rating for the HP speech was 2.59. Separate paired t tests revealed no significant difference between the LP or the HP speech for either the nasalance scores or the Nasality ratings. The correlation coefficient between nasalance and Nasality for the LP speech was r = 0.78, and for the HP speech r = 0.77. Using a cutoff of 26% for nasalance and 2.0 for Nasality, Nasometer test sensitivity was 0.84 and test specificity was 0.88. Conclusions: In general, clinicians ...
