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The primary purpose of this investigation was to explore the effects of variable doses of home practice Vocal Function Exercises (VFEs) on attainment of pre-established maximum phonation time (MPT) goals in individuals between the ages of 18 and 25 with normal voice. A secondary purpose was to monitor for potentially toxic effects of high doses of VFEs. Three experimental groups completed a six-week VFE protocol and practiced twice daily. The low dose group performed each exercise once, the traditional group twice, and the high dose group four times. Results indicated significant change in VFE MPT for all three groups and higher goal attainment in the high dose group. Low doses appear insufficient to produce substantial change in voice production. Acoustic MPT improved most in the traditional dosage group, which also exhibited best maintenance and best overall outcomes. No toxic effects in vocal fold condition or phonation were observed or measured secondary to high VFE exposure.

Les bandes ventriculaires sont deux structures du larynx dont l'implication a été observée pour certaines réalisations vocales. L'origine de leur participation dans le geste phonatoire et les effets induits sur le son laryngé sont peu explorés et encore mal compris.<br />Cette étude se propose de modéliser l'impact aérodynamique des bandes ventriculaires sur la vibration glottique par une description théorique de l'écoulement translaryngé couplée à un modèle physique de phonation. L'interaction entre les cordes vocales et les bandes ventriculaires est caractérisée par une exploration conjointe sur l'humain (par électroglottographie et cinématographie ultra-rapide synchronisées) et sur des maquettes du larynx rigides et déformables (par visualisation d'écoulement, mesures PIV et mesures de pression).<br />Le comportement des bandes ventriculaires est observé dans différents contextes phonatoires (phonation usuelle, chant de gorge, grognement, effort vocal). Elles peuvent rester immobiles éloignées, se rapprocher, s'accoler, vibrer périodiquement ou non, en phase ou non avec les cordes vocales. Le phénomène de doublement de période mesuré en chant de gorge fait l'objet d'une étude approfondie. La variation périodique de la durée du cycle glottique est démontrée. L'incidence de la géométrie ventriculaire sur la résistance de l'écoulement translaryngé, la fréquence, l'amplitude et les pressions de seuils d'oscillation est mesurée in-vitro et comparée aux prédictions théoriques. La présence de la constriction ventriculaire en aval de la maquette des cordes vocales peut modifier son comportement vibratoire, altérant ou favorisant les auto-oscillations selon la configuration géométrique.

Thèse numérisée par la Direction des bibliothèques de l'Université de Montréal.

The primary purpose of this investigation was to explore the effects of varying degrees of vocal tract semi-occlusion in Vocal Function Exercises (VFEs) on attainment of pre- established maximum phonation time (MPT) goals in individuals between the ages of 18 and 45 with normal voice. Individuals were randomized into three experimental groups: the traditional VFE with a semi-occluded vocal tract (SOVT), modified /o/ with partial occlusion, and modified /a/ without significant occlusion. For six weeks, the participants completed the four exercises two times each, twice daily on corresponding vocal tract postures assigned by group. Results indicated significant change in percent of MPT goal attained for the traditional VFE group. Neither modified vocal tract group resulted in significant change. Decreased occlusion appears insufficient in producing substantial change in voice production despite increased compliance compared to the traditional VFE group.

Esta dissertação analisa alguns aspectos fonéticos e fonológicos das consoantes glotalizadas da língua Dâw. Argumenta-se a favor da proposta de que, na língua Dâw, a glotalização é uma propriedade segmental e distintiva, conforme descrito por Martins (2004), restrita à classe das consoantes soantes. Observa-se mais de uma forma fonética nas consoantes glotalizadas, que incluem, sobretudo, fonação rangeada e voz áspera (ESLING; HARRIS, 2003). Quando comparadas às consoantes simples equivalentes, as consoantes glotalizadas são, em geral, mais curtas, têm forma de onda dos ciclos glotais mais irregular, H1H2 menor e frequência fundamental mais alta (nos casos sem rangeado). Exceto pelos níveis de frequência fundamental, as propriedades acústicas dos segmentos vizinhos não são afetadas. A glotalização confina-se ou manifesta-se com maior intensidade nas partes das consoantes que se encontram mais distantes das vogais adjacentes, padrão que também foi notado em outras línguas do mundo (PLAUCHÉ et al., 1998). Verificou-se que o aumento de frequência fundamental causado pela glotalização não provoca restrições no sistema tonal da língua Dâw e que os níveis de frequência fundamental dos tons lexicais são priorizados. A confirmação fonética do processo de redução silábica descrito por Martins (2004) permite defender que a glotalização e a oclusiva glotal compartilham o mesmo traço ou se definem por gestos semelhantes, sobretudo porque a comparação das características de ambas e a avaliação das consoantes soantes vizinhas de oclusivas glotais reforçam a semelhança. Entretanto, não há dados suficientes para sustentar a proposta de Martins (2005) de que as consoantes glotalizadas da língua Dâw originaram-se simplesmente da incorporação de traços das oclusivas glotais pelas consoantes simples. Por fim, observou-se que as ocorrências das formas da glotalização se relacionam com a nasalidade dos segmentos e com o sexo e a faixa etária dos falantes. A relação entre nasalidade e forma da glotalização, assim como o padrão temporal das consoantes glotalizadas, talvez possam ser explicados por fatores aerodinâmicos ou perceptuais (GORDON; LADEFOGED, 2001). Entretanto, este estudo não pôde avançar na compreensão da motivação desses fatos. A relação entre sexo, faixa etária e forma da glotalização não indica mudança em curso e demanda uma pesquisa sociolinguística mais aprofundada. / This thesis analyses some phonetic and phonological aspects of the glottalized sonorants of Dâw language. It argues in favor of the proposal that characterizes glottalization in Dâw language as a contrastive and a segmental property restricted to the class of the sonorant consonants (MARTINS, 2004). It describes more than one phonetic form for the glottalized consonants, mainly including creaky voice and harsh voice (ESLING; HARRIS, 2003). In general, the glottalized consonants are shorter, their glottal cycles have a more irregular waveform, they have smaller H1H2 and higher fundamental frequency (when creaky voice is absent) than the correspondent plain consonants. Except for the fundamental frequency levels, glottalization does not affect the acoustic properties of the neighbor segments. Glottalization is limited to or appears more noticeably in the parts of the consonants that are found at a greater distance from the neighbor vowels, a pattern that was also found in other languages (PLAUCHÉ et al., 1998). It was found that the increase in the fundamental frequency caused by glottalization does not restrict the tonal system in Dâw and the fundamental frequency levels of the lexical tones are prioritized. The phonetic confirmation of the process of syllable reduction described by Martins (2004) allows us to defend that glottalization and the glottal stop share the same feature or are defined by similar gestures, especially because the similarity is reinforced by the phonetic comparison between both phonemic entities and by the evaluation of the sonorant consonants in the neighborhood of the glottal stops. However, there is not sufficient information to sustain the proposal of Martins (2005) that the glottalized consonants in Dâw were originated merely from the incorporation of the glottal stop features by the plain consonants. Finally, this thesis notes that the occurrences of the glottalization types relate with the nasalization of the segments and the sex and the age group of the speakers. The relation between nasalization and glottalization type, as well as the glottalization timing, perhaps can be explained by aerodynamic and perceptual factors (GORDON; LADEFOGED, 2001). Nevertheless, this study was not able to deepen the understanding of the reasons for the aforementioned facts. The relation between sex, age group and glottalization type does not imply an ongoing change and demands further sociolinguistic research.

Made available in DSpace on 2016-04-28T18:23:18Z (GMT). No. of bitstreams: 1 trabalho_final_Sabrina_Cukier.pdf: 978816 bytes, checksum: bb749299f4f03afcc46e3326572a9af7 (MD5) Previous issue date: 2006-09-15 / Conselho Nacional de Desenvolvimento Científico e Tecnológico / Objective: investigating the perceptual, acoustic and physiological vocal quality of a group of asthmatic individuals with paradoxical vocal fold dysfunction (PVFD) in relation to a group of asthmatic individuals without PVFD and a group of individuals without breathing problems. Methods: recording of acoustic and electroglottographic speech data from 9 individuals with PVFD, 8 with asthma without PVFD and 8 without breathing problems (control group). The perceptual analysis was carried out by means of the phonetic vocal quality analysis protocol. The acoustic analysis comprised both long and short term spectra. The Lx wave of the electroglottographic signals were analyzed and measures relative to the phases of the glottal cycle were extracted. Results: Both PVFD and asthma groups presented supralaryngeal settings characterized by smaller extension and higher constriction of the vocal tract. Laryngeal settings of both PVFD and asthma groups were found to be characterized by hyperfunction, creaky voice, rough voice, breathy voice, sonority breaks, diplophonia and instability, with higher frequency of occurrence of rough voice and breathy voice adjustments and short term instability events in the asthma group. The analysis of the long term spectrum declination lines made it possible to differentiate among the groups and genders: higher degree of spectral intensity was found in the feminine asthma and the masculine control groups and higher degree of spectral intensity in the PVFD group, differentiation also brought out by intensity measures of short and long term spectra. The inspection of the Lx wave revealed the asthma and PVFD groups differed from the control group due to the presence of noise, low intensity and prolonged closed phases. The electroglottographic measures related to speed index and contact coefficient area differentiated the asthma and PVFD groups. Conclusions: the analysis of the data corroborates the hypothesis of the presence of vocal alteration in patients with PVFD and in patients with asthma and favors the description of vocal quality as a diagnosis method, delineating the important demand of speech therapy treatment for these patients / Objetivo: investigar a qualidade vocal de um grupo de indivíduos com disfunção paradoxal de pregas vocais (DPPV) com asma em relação a um grupo de indivíduos asmáticos sem DPPV e a um grupo de indivíduos sem problemas respiratórios, segundo aspectos fonéticos (perceptivo-auditivos, acústicos e fisiológicos). Métodos: gravação de amostras de fala dos sinais acústico e eletroglotográfico de 9 indivíduos com DPPV, 8 com asma sem DPPV e 8 sem problemas respiratórios (grupo controle). O sinal acústico foi analisado do ponto de vista perceptivo-auditivo com roteiro de descrição da qualidade vocal com motivação fonética. As modalidades de análise acústica utilizadas foram os espectros de longo e curto termo. O sinal eletroglotográfico foi analisado a partir da filtragem dos registros, da inspeção da onda Lx e da extração de medidas que refletem as fases do ciclo glótico. Resultados: foram identificados, nos grupos DPPV e asma, ajustes supralaríngeos caracterizados por menor extensão e maior constrição do trato vocal. Os ajustes laríngeos indicaram hiperfunção, voz crepitante, voz áspera, escape de ar, quebras de sonoridade, diplofonia e instabilidade nos grupos DPPV e asma com maior ocorrência de ajuste de voz áspera, escape de ar e ocorrência de curto termo de instabilidade no grupo asma. Na análise acústica de longo termo houve diferenciação entre os grupos e gêneros com maior declínio espectral no grupo asma feminino e controle masculino e maior intensidade espectral no grupo DPPV, diferenciação marcada também pelas medidas espectrais de curto e longo termo. Em termos fisiológicos, na inspeção da onda Lx os grupos asma e DPPV aproximaram-se e diferenciam-se do grupo controle porque apresentaram ruído, baixa intensidade e fase fechada alongada. As medidas eletroglotográficas índice de velocidade e área do coeficiente de contato diferenciaram os grupos asma e DPPV. Conclusões: a análise dos dados contempla a hipótese de alteração vocal em pacientes com DPPV e em pacientes com asma e possibilita a descrição da qualidade vocal como um método de diagnóstico, apontando para a importante demanda de tratamento fonoaudiológico junto a estes pacientes

Esta dissertação analisa alguns aspectos fonéticos e fonológicos das consoantes glotalizadas da língua Dâw. Argumenta-se a favor da proposta de que, na língua Dâw, a glotalização é uma propriedade segmental e distintiva, conforme descrito por Martins (2004), restrita à classe das consoantes soantes. Observa-se mais de uma forma fonética nas consoantes glotalizadas, que incluem, sobretudo, fonação rangeada e voz áspera (ESLING; HARRIS, 2003). Quando comparadas às consoantes simples equivalentes, as consoantes glotalizadas são, em geral, mais curtas, têm forma de onda dos ciclos glotais mais irregular, H1H2 menor e frequência fundamental mais alta (nos casos sem rangeado). Exceto pelos níveis de frequência fundamental, as propriedades acústicas dos segmentos vizinhos não são afetadas. A glotalização confina-se ou manifesta-se com maior intensidade nas partes das consoantes que se encontram mais distantes das vogais adjacentes, padrão que também foi notado em outras línguas do mundo (PLAUCHÉ et al., 1998). Verificou-se que o aumento de frequência fundamental causado pela glotalização não provoca restrições no sistema tonal da língua Dâw e que os níveis de frequência fundamental dos tons lexicais são priorizados. A confirmação fonética do processo de redução silábica descrito por Martins (2004) permite defender que a glotalização e a oclusiva glotal compartilham o mesmo traço ou se definem por gestos semelhantes, sobretudo porque a comparação das características de ambas e a avaliação das consoantes soantes vizinhas de oclusivas glotais reforçam a semelhança. Entretanto, não há dados suficientes para sustentar a proposta de Martins (2005) de que as consoantes glotalizadas da língua Dâw originaram-se simplesmente da incorporação de traços das oclusivas glotais pelas consoantes simples. Por fim, observou-se que as ocorrências das formas da glotalização se relacionam com a nasalidade dos segmentos e com o sexo e a faixa etária dos falantes. A relação entre nasalidade e forma da glotalização, assim como o padrão temporal das consoantes glotalizadas, talvez possam ser explicados por fatores aerodinâmicos ou perceptuais (GORDON; LADEFOGED, 2001). Entretanto, este estudo não pôde avançar na compreensão da motivação desses fatos. A relação entre sexo, faixa etária e forma da glotalização não indica mudança em curso e demanda uma pesquisa sociolinguística mais aprofundada. / This thesis analyses some phonetic and phonological aspects of the glottalized sonorants of Dâw language. It argues in favor of the proposal that characterizes glottalization in Dâw language as a contrastive and a segmental property restricted to the class of the sonorant consonants (MARTINS, 2004). It describes more than one phonetic form for the glottalized consonants, mainly including creaky voice and harsh voice (ESLING; HARRIS, 2003). In general, the glottalized consonants are shorter, their glottal cycles have a more irregular waveform, they have smaller H1H2 and higher fundamental frequency (when creaky voice is absent) than the correspondent plain consonants. Except for the fundamental frequency levels, glottalization does not affect the acoustic properties of the neighbor segments. Glottalization is limited to or appears more noticeably in the parts of the consonants that are found at a greater distance from the neighbor vowels, a pattern that was also found in other languages (PLAUCHÉ et al., 1998). It was found that the increase in the fundamental frequency caused by glottalization does not restrict the tonal system in Dâw and the fundamental frequency levels of the lexical tones are prioritized. The phonetic confirmation of the process of syllable reduction described by Martins (2004) allows us to defend that glottalization and the glottal stop share the same feature or are defined by similar gestures, especially because the similarity is reinforced by the phonetic comparison between both phonemic entities and by the evaluation of the sonorant consonants in the neighborhood of the glottal stops. However, there is not sufficient information to sustain the proposal of Martins (2005) that the glottalized consonants in Dâw were originated merely from the incorporation of the glottal stop features by the plain consonants. Finally, this thesis notes that the occurrences of the glottalization types relate with the nasalization of the segments and the sex and the age group of the speakers. The relation between nasalization and glottalization type, as well as the glottalization timing, perhaps can be explained by aerodynamic and perceptual factors (GORDON; LADEFOGED, 2001). Nevertheless, this study was not able to deepen the understanding of the reasons for the aforementioned facts. The relation between sex, age group and glottalization type does not imply an ongoing change and demands further sociolinguistic research.

Dans la rééducation selon la Méthode de la paille, on utilise des constrictions du tractus vocal, en particulier une paille (2 à 5mm de diamètre). Le débit de sortie doit être soutenu et indépendant de la fréquence. Chez un sujet expert :- PSG, PIO et débit de sortie dépendent du diamètre de la paille- PSG augmente avec la fréquence- débit et PIO sont peu sensibles à la fréquence- la différence [PSG - PIO] (ΔP) est indépendante du diamètre de la paille- le ΔP est identique au seuil de pression phonatoire (SPP) - sur les constrictives (/z/, /ʁ/ et /ʒ/), le ΔP est au-dessus du SPP- dans les enchaînements [constrictive - voyelle], le débit reste constant et la pression sousglottique baisse modérémentSur une population de 36 adultes sains, la valeur la plus basse du SPP se trouve au fondamental usuel de la voix.Sur une population de 22 sujets, les SPP s'abaissent avec la pratique des exercices. Les examens en fibro- et radiovidéoscopie, pendant et après les exercices montrent que :- les cavités sus-glottiques sont dilatées pendant et après l'exercice- la constriction glottique augmente avec la résistance à la sortie- le plan glottique s'élève légèrement avec la fréquenceDix instrumentistes à vent ont été examinés en fibrovidéoscopie : il y a une adduction des plis vocaux pendant le jeu et une importante activité synergique de la glotte sur le jeu en détaché. Les perspectives dégagées par ce travail intéressent :- la clinique, dans l'exploration des troubles de la voix.- la rééducation et la pédagogie- la phonétique (étude des interactions pavillon - source) / The reeducation according to the Methode of the straw using constrictions of the vocal tract, in particular a straw (2 in 5mm of diameter). The release flow must be steady and independent from the frequency. At a subject expert in the method: - PSG, PIO and release flow) depend on the diameter of the straw- PSG increases with the frequency- flow and PIO seem little perceptible to the variations of frequency- the difference [PSG - PIO] (ΔP) is independent from the diameter of the straw- the ΔP value is identical to the SPP - on the constrictive (/z/, /ʁ/ et /ʒ/) the ΔP is over the SPP- in the sequences [constrictive - vowel], the flow remains constant and the subglottal pressure falls moderatelyOn a population of 36 healthy adults, the lowest value of the SPP being in fundamental usual of the voice. On a population of 22 subjects, the SPP fall with the practice of the exercises. The examines with fibro- and radiovideoscopia during and after the execution of the exercises show that: - the supraglottal cavities are dilated during and after the exercise- the glottal constriction increases with the release resistance- the glottal plan rise slightly with the frequencyTen wind instrumentalists were examined with fibrovideoscopia: there is a adduction of the vocal folds during the play and an important synergic activity of the glottis during the staccato play.The perspectives cleared by this work could interest:- the clinical exploration of the voice disorders- the voice rehabilitation and pedagogy- the phonetic (study of the interactions [ tract - glottal source])

This thesis explores, through a number of production andperception studies, the nature of the voice source signal andhow it varies in spoken communication. Research is alsopresented that deals with the techniques and methodologies foranalysing and synthesising the voice source. The main analytictechnique involves interactive inverse filtering for obtainingthe source signal, which is then parameterised to permit thequantification of source characteristics. The parameterisationis carried by means of model matching, using the four-parameterLF model of differentiated glottal flow. The first three analytic studies focus on segmental andsuprasegmental determinants of source variation. As part of theprosodic variation of utterances, focal stress shows for theglottal excitation an enhancement between the stressed voweland the surrounding consonants. At a segmental level, the voicesource characteristics of a vowel show potentially majordifferences as a function of the voiced/voiceless nature of anadjacent stop. Cross-language differences in the extent anddirectionality of the observed effects suggest differentunderlying control strategies in terms of the timing of thelaryngeal and supralaryngeal gestures, as well as in thelaryngeal tensions settings. Different classes of voicedconsonants also show differences in source characteristics:here the differences are likely to be passive consequences ofthe aerodynamic conditions that are inherent to the consonants.Two further analytic studies present voice source correlatesfor six different voice qualities as defined by Laver'sclassification system. Data from stressed and unstressedcontexts clearly show that the transformation from one voicequality to another does not simply involve global changes ofthe source parameters. As well as providing insights into theseaspects of speech production, the analytic studies providequantitative measures useful in technology applications,particularly in speech synthesis. The perceptual experiments use the LF source implementationin the KLSYN88 synthesiser to test some of the analytic resultsand to harness them to explore the paralinguistic dimension ofspeech communication. A study of the perceptual salience ofdifferent parameters associated with breathy voice indicatesthat the source spectral slope is critically important andthat, surprisingly, aspiration noise contributes relativelylittle. Further perceptual tests using stimuli with differentvoice qualities explore the mapping between voice quality andits paralinguistic function of expressing emotion, mood andattitude. The results of these studies highlight the crucialrole of voice quality in expressing affect as well as providingpointers to how it combines withf0for this purpose. The last section of the thesis focuses on the techniquesused for the analysis and synthesis of the source. Asemi-automatic method for inverse filtering is presented, whichis novel in that it optimises the inverse filter by exploitingthe knowledge that is typically used by the experimenter whencarrying out manual interactive inverse filtering. A furtherstudy looks at the properties of the modified LF model in theKLSYN88 synthesiser: it highlights how it differs from thestandard LF model and discusses the implications forsynthesising the glottal source signal from LF model data.Effective and robust source parameterisation for the analysisof voice quality is the topic of the final paper: theeffectiveness of global, amplitude-based, source parameters isexamined across speech tokens with large differences inf0. Additional amplitude-based parameters areproposed to enable a more detailed characterisation of theglottal pulse. <b>Keywords:</b>Voice source dynamics, glottal sourceparameters, source-filter interaction, voice quality,phonation, perception, affect, emotion, mood, attitude,paralinguistic, inverse filtering, knowledge-based, formantsynthesis, LF model, fundamental frequency,f0.