A nasalidade da fala sofre influência de fatores como tamanho e formato da cavidade oral e da configuração da cavidade nasal. Nas deformidades dentofaciais são encontradas alterações no crescimento dos ossos da mandíbula e/ou maxila, estruturas diretamente relacionadas a estas cavidades. O objetivo deste estudo foi analisar a influência da deformidade dentofacial e o efeito da cirurgia ortognática nos escores de nasalância, em um acompanhamento de 6 meses de pós-operatório. Para o desenvolvimento deste estudo foram triados 146 indivíduos, de ambos os sexos, com idade superior a 18 anos, alfabetizados, sem distinção de raça e nível socioeconômico. Foram selecionados 91 indivíduos, sendo 53 com deformidades dentofaciais (23 classe II, idade média 27,4 anos; e 31 classe III, idade média 27,2 anos) e 37 sem deformidade dentofacial (grupo controle, idade média 25,3 anos). Os sujeitos foram submetidos inicialmente a uma entrevista e a uma avaliação miofuncional orofacial, em seguida, foi avaliado o fluxo aéreo nasal, por meio do espelho Milimetrado de Altmann®, e realizada a nasometria utilizando o Nasômetro II modelo 6400 (KayPENTAX, New Jersey - USA), durante a leitura de 10 frases padronizadas, do português brasileiro. Nos sujeitos com deformidades dentofaciais estes procedimentos foram repetidos em 3 períodos distintos do pós-operatório (P.O. I, II e III). Para a análise estatística foram utilizados os testes ANOVA two-way (p<0,05), para analisar o efeito da cirurgia nos escores de nasalância, e t de Student (p<0,05), para identificar em qual período ocorreu. No período pré-operatório os valores médios e os desvios-padrão dos escores de nasalância dos indivíduos controles e com deformidades dentofaciais classe II e III foram, respectivamente, 48.1% (5.9), 48.9% (6.7) e 45.4% (9.7) para o texto nasal e 12.0% (5.3), 14.9% (7.0) e 10.6% (5.4) para o texto oral, valores dentro dos padrões de normalidade para indivíduos brasileiros; a análise desses dados não mostrou diferença significativa entre os grupos. Quanto ao efeito da cirurgia ortognática nos escores de nasalância houve diferença estatisticamente significante para os fatores tempo-grupo no texto 6 oral, diferença evidenciada entre os períodos pré-operatório e P.O. III. Diante dos achados, pode-se concluir que o tipo de deformidade dentofacial pareceu não influenciar os escores de nasalância, já a cirurgia ortognática provocou efeito nesses escores, dentro de um período de 6 meses, porém sem alterar as características da nasalidade da fala, visto que os escores de nasalância se mantiveram dentro dos padrões de normalidade. / Factors such as size and shape of the oral cavity and the nasal cavity configuration may influence nasalance scores. In dentofacial deformities the abnormal growth of jaw and maxillary bones is directly related with changes in these cavities. The aim of this study was to analyze the influence of dentofacial deformity and the effect of orthognathic surgery on nasalance scores, during a 6-month post-operative followup. In order to develop this study, 146 individuals of both sexes, over 18 years older, literate, without distinction of race and socioeconomic status, were screened. Ninetyone individuals were selected, which 53 had dentofacial deformities (23 class II, mean age 27.4 years, and 31 class III, mean age 27.2 years) and 37 without dentofacial deformity (control group, mean age 25.3 years). The subjects were submitted to an interview and an orofacial myofunctional evaluation, then the nasal airflow was evaluated through the Altmann® graded mirror, and the nasometry was acquired with Nasometer II model 6400 (KayPENTAX, New Jersey - USA ) device, based on reading of 10 sentences standardized, from Brazilian Portuguese. In subjects with dentofacial deformities these procedures were repeated in 3 different postoperative periods (P.O. I, II and III). To analyze the surgery effect on nasalance scores it was used ANOVA two-way test (p<0.05) and Student\'s t test (p<0.05) was used to identify which period it occurred. In the preoperative period, the mean values and the standard deviations of the nasalance scores of the control group and groups with class II and III dentofacial deformities were, respectively, 48.1% (5.9), 48.9% (6.7) and 45.4% (9.7) for the nasal text and 12.0% (5.3), 14.9% (7.0) and 10.6% (5.4) for the oral text, values within normality standards for Brazilian individuals; analyzing these data no significant difference between the groups were found. About effect of orthognathic surgery on nasalance scores it was found a significant difference in time-group factor for the oral text and comparing the mean nasalance scores in the different periods, the difference was evidenced between the preoperative and PO III periods. Considering the findings, it can be concluded that the type of dentofacial 8 deformity did not appear to influence the nasalance scores, whereas the orthognathic surgery had an effect on these scores within a period of 6 months, but did not changing the nasality characteristics of the speech, because groups had scores within the normal range.

Orientador: Maria Bernadete Marques Abaurre / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Estudos da Linguagem / Made available in DSpace on 2018-08-02T07:02:29Z (GMT). No. of bitstreams: 1 Salanova_AndresPablo_M.pdf: 3940770 bytes, checksum: 82053ae7e623981dda7134b816553fb4 (MD5) Previous issue date: 2001 / Resumo: Esta tese tem uma dupla finalidade. Em primeiro lugar, ela se propõe a descrição dos sistemas fonológicos de duas línguas Jê setentrionais bastante próximas entre si: Mebengokre (língua das nações Xikrin e Kayapó) e Apinayé (língua da nação homônima). Em segundo, propõe-se a discutir de maneira critica a própria noção de sistema fonológico, mostrando como certos fatos que nos estudos descritivos são normalmente tratados como "processos fonológicos" divorciados do sistema (pensado às vezes como mero inventário), dizem respeito às oposições constitutivas do sistema fonológico. Para exemplificar estas idéias, nos detemos em certos processos que envolvem nasalidade e vozeamento nestas línguas. Uma das diferenças mais nítidas entre a fonologia do Mebengokre e a do Apinayé diz respeito ao comportamento das consoantes "nasais": no primeiro sistema, as consoantes nasais contrastam claramente com oclusivas sonoras. Em Apinayé, ao contrário, consoantes plenamente nasais e consoantes oclusivas sonoras com contornos nasalizados estão em distribuição complementar. Em um primeiro momento, argumentamos que representar as consoantes de contorno como tendo especificação de [nasal] nos leva a certos constrangimentos (a nasalidade teria, nestes segmentos, comportamento absolutamente "passivo", recuando inclusive diante de [-nasal], e por isso optamos por uma representação na qual a nasalidade pode ser um epifenômeno da implementação do vozeamento soante. Alguns fatos do Apinayé, no entanto, sugerem que, pelo menos os segmentos de coda não podem ser caracterizados simplesmente como "soantes não especificados para nasalidade": um destes fatos é a permanência de uma transição nasal breve entre segmentos orais após o desligamento de uma destas consoantes. Esta tese dá continuidade a algumas das reflexões colocadas por primeira vez em D'Angelis (1998) em relação a outras línguas do tronco Macro-Jê. A discussão sobre a noção de sistema fonológico se inspira no estruturalismo do Círculo Lingüístico de Praga; desenvolvimentos posteriores são pensados sempre à luz das intuições de Trubetzkoy (1939). Entre as reflexões mais recentes em tomo da representação das nasais, levamos em conta aqui principalmente os trabalhos de SteIiade (1993) e Piggott (1992) / Abstract: This thesis has a double purpose. In the first place, it endeavors to describe the phonological systems of two closely related Norther Jê languages: Mebengokre (the language of the Kayapó and Xikrin nations), and Apinayé (the language of the homonymous nation). In the second place, it intends to discuss ritically the notion of phonological system, showing the way in which certain facts that are normally treated in descriptive studies as "phonological processes", divorced from the system (which is often thought of as a mere inventory) , are directly relevant to the oppositions that constitute the phonological system. To exemplify these ideas, we devote our attention to certain processes that involve nasality and voicing in these two languages. Une of the clearest differences between the phonology of Mebengokre and Apinayé regards the behavior of so-called "nasal" consonants: in the first system, nasal consonants clearly contrast with voiced stops. In Apinayé, on the other hand, fully nasal consonants and voiced stops with nasalized contours are in complementary distribution. We argue initially that to represent the contour segments as being specified for the feature [nasal] leads us to an untenable situation: nasality would exhibit, in these segments, a completely passive behavior, retreating even next to [-nasal]; for this reason we opt for a representation in which. nasality could be thought of as an epiphenomenon of the implementation of sonorant voicing. Some facts of the Apinayé language nevertheless suggest that at least coda segments cannot be characterized simply as "sonorants unspecified for nasality": one of these facts is the permanence of a brief nasal transition between oral segments after the delinking of one of these coda consonants. This thesis takes up some ofthe points initially raised by D'Angelis (1998) in relation to other languages in the Macro-Jê stock. The discussion about the notion of phonological system is mainly inspired in the structuralist paradigm of the Prague Linguistic Circle; later developments are always put thought in the light ofTrubetzkoy's (1939) intuitions. Among the more recent reflections regarding the representation of nasals, we here take into account mainly the works of Steriade (1993) and Piggott (1992) / Mestrado / Mestre em Linguística

Le bribri est une langue chibcha parlée au Costa Rica (Amérique Centrale). Les langues chibcha représentent la principale famille de l’Aire Intermédiaire (Constenla 1991), qui relie la Mesoamérique aux zones amazonienne et andine. Ce sont cependant toutes des langues en danger, encore relativement peu décrites.Cette thèse est une analyse de la phonologie du bribri (Schlabach 1974 ; Wilson 1974 ; Constenla 1981 ; Jara 2004), problématisée autour de ses caractéristiques typologiques :(i) Le système nasal : le bribri fait partie des rares langues du monde dans lesquelles la nasalité n’est pas distinctive pour les consonnes. Les consonnes nasales présentes dans l’output sont le résultat d’harmonies nasales (Cohn 1993 ; Walker 1998, 2001) et d’hypervoisement par abaissement du voile du palais (Iverson & Salmons 1996 ; Solé 2009). Alors que le premier processus avait en partie été décrit pour le bribri (Wilson 1970 ; Constenla 1982, 1985 ; Tohsaku 1987), le second n’avait pas encore été identifié.(ii) La consonne /tk/ : une unité distinctive, combinant deux lieux, sans pour autant être une consonne doublement articulée, contrairement à ce qui avait précédemment été décrit (Lehmann 1920 ; Schlabach 1974 ; Wilson 1974 ; Constenla 1981 ; Jara 2004). Je propose de l’analyser comme une géminée modulée (contour segment, Sagey 1990).La présente étude s’inscrit dans la lignée des travaux qui considèrent que les structures phonologiques doivent être expliquées par des contraintes phonétiques, comme les travaux précurseurs d’Ohala (1975, 1981, 1983). J’utilise plus particulièrement le modèle de la Phonologie Articulatoire (Browman & Goldstein 1986, 1989). Les analyses s’appuient sur des données acoustiques, récoltées dans deux communautés bribri entre 2012 et 2014 (Bajo Coen - Coroma et Amubre).En plus d’une démarche typologique et phonétique, j’adopte une approche dialectale et diachronique, afin de mieux appréhender le système phonologique de la langue. / Bribri is a Chibchan language spoken in Costa Rica (Central America). Chibchan languages form the main family of the Intermediate Area (Constenla 1991), which links Mesoamerica to the Amazonian and the Andean regions. All of them are endangered and are still under described.This dissertation provides an analysis of Bribri phonology (Schlabach 1974; Wilson 1974; Constenla 1981; Jara 2004) problematized according to its typological characteristics:(i) The nasal system: Bribri is among the few languages in the world to lack distinctive nasal consonants. The nasal consonants present in the output result from nasal harmony (Cohn 1993; Walker 1998, 2001) and hypervoicing through velopharyngeal opening (Iverson & Salmons 1996; Solé 2009). While the first process has been partially described for Bribri (Wilson 1970; Constenla 1982, 1985; Tohsaku 1987), the second has not been individuated in the language.(ii) The consonant /tk/: the consonant /tk/ is a distinctive unit which combines two places of articulation. Contrary to what has been previously described (Lehmann 1920; Schlabach 1974; Wilson 1974; Constenla 1981; Jara 2004), it is not a doubly articulated consonant. I propose to analyse it as a contour geminate consonant (based on the concept of contour segment, Sagey 1990).Following Ohala’s pioneering work (1975, 1981, 1983), this work is based on the assumption that phonological structures must be explained by phonetic constraints. More specifically, I use the Articulatory Phonology frame (Browman & Goldstein 1986, 1989). The analysis is based on acoustic data collected among two Bribri communities, between 2012 and 2014 (Bajo Coen - Coroma and Amubre).Along the typological and phonetic approach, I have adopted a dialectal and diachronical point of view to better capture the phonological system of the language.

Cette thèse porte sur la perception visuelle, auditive et audiovisuelle des voyelles nasales [ɑ̃] (« lent »),[ɔ̃] (« long ») et [ɛ̃] (« lin ») par des adultes devenus sourds, implantés cochléaires et implantés dutronc cérébral. L’étude sur la perception visuelle des voyelles, auprès de 22 adultes devenus sourds,redéfinit les sosies labiaux des voyelles nasales et propose une mise à jour de la classification desvisèmes. Trois études sur l’identification auditive des voyelles nasales auprès de 82, 15 et 10 adultesimplantés cochléaires mettent en évidence leur difficulté à reconnaitre les trois voyelles nasales, qu’ilsperçoivent comme des voyelles orales. Les analyses acoustiques et perceptives suggèrent que lesadultes implantés cochléaires s’appuient sur les informations fréquentielles des deux premiers picsspectraux mais négligent les informations d’intensité relative de ces pics. D’après l’étude menéeauprès de 13 adultes implantés du tronc cérébral, des informations acoustiques linguistiques sonttransmises par l’implant du tronc cérébral mais la fusion entre les informations auditives et visuellespourrait être optimisée pour l’identification des voyelles. Enfin, une enquête auprès de 179orthophonistes pointe le besoin d’une information sur la définition phonétique articulatoire actualiséedes voyelles [ɑ̃] et [ɛ̃]. / This thesis focuses on the visual, auditory and auditory-visual perception of french nasal vowels [ɑ̃](« lent »), [ɔ̃] (« long ») and [ɛ̃] (« lin ») by Cochlear Implant (CI) and Auditory Brainstem Implant(ABI) adults users. The study on visual perception of vowels, with 22 deafened adults, redefines thelip configuration of french nasal vowels and provides an update of the classification of vocalic visualphonemes. Three studies on auditory identification of nasal vowels with 82, 15 and 10 CI usershighlight their difficulty in recognizing the three nasal vowels, which they perceive as oral vowels.Acoustic and perceptual analyzes suggest that adults with CI rely on frequency informations of thefirst two spectral peaks but miss the informations of relative intensity of these peaks. The study with13 ABI users show that some linguistic acoustic cues are transmitted by the ABI but the fusion ofauditory and visual features could be optimized for the identification of vowels. Finally, a survey of179 Speech Language and Hearing Therapists show the need of an update on the phonetic articulationof french nasal vowels [ɑ̃] and [ɛ̃].

Ce mémoire est une étude phonologique et phonétique visant à ordonner les voyelles nasales en fonction de leur degré en sonorité. Jusqu'à présent, la sonorité des voyelles nasales n’a pas été abordée dans la littérature phonologique et phonétique; ainsi, cette étude vise à combler cette lacune de la recherche en menant une étude typologique et expérimentale des différentes qualités des voyelles nasales. La première partie du mémoire comprend un examen du comportement et de la distribution des voyelles nasales dans les langues du monde afin d'élucider leur place dans l’échelle de sonorité. La partie typologique montre que, dans trois des langues étudiées, seules les voyelles nasales hautes subissent des processus phonologiques comme l’harmonie nasale et la réduction vocalique tandis que, dans deux des langues étudiées, seule la voyelle nasale basse subit des processus phonologiques comme le changement vocalique déplacement de la voyelle et l’attraction de l’accent. La deuxième partie est une expérience nasométrique dans laquelle l’intensité des voyelles nasales et orales est mesurée. L’analyse d’intensité permet de déterminer le niveau de sonorité de chaque voyelle nasale car l’intensité est considérée comme le corrélat physique le plus saillant de la sonorité. L'analyse statistique descriptive effectuée sur l'ensemble des données des voyelles organisées selon leur hauteur (c'est-à-dire haute, mi-haute, mi-basse ou basse) et leur type (nasal ou oral) montre que [a] est la voyelle orale la plus haute en intensité relatif. Quant aux voyelles nasales, [ĩ] est la plus élevée en intensité. Ainsi, suite à l’analyse statistique inférentielle, nous avons établi une échelle permettant de classer les voyelles orales et nasales en fonction de leur intensité. / This thesis is a phonological and phonetic study to classify nasal vowels according to their rank in sonority. To date, the sonority of nasal vowels has not been covered in the phonology and phonetics literature; thus, this study aims to fill that research gap through conducting a typological and experimental investigation of different qualities of nasal vowels. The first part of this thesis includes an examination of the behaviour and the distribution of nasal vowels in the world’s languages to elucidate the place of nasal vowels in sonority hierarchy. The typological part of this study shows that, in three selected languages, only high nasal vowels undergo phonological processes such as nasal harmony and vowel reduction while, in two other selected languages, only the low nasal vowel undergoes phonological processes like vowel shift and attraction of stress. The second part of this study presents the findings of a nasometric experiment in which the intensity of nasal vowels and oral vowels is measured. Analysing intensity helps to determine the level of sonority of each nasal vowel, because intensity is considered the most salient physical correlate of sonority. The descriptive statistical analysis performed on the data set of vowels organized according to height (i.e., high, mid-high, mid-low, and low) and type (nasal or oral) shows that, [a] is the highest in relative intensity. As for nasal vowels, [ĩ] is the highest in intensity. Thus, according to the inferential statistical analysis, we established a scale that classifies oral and nasal vowels according to their intensity.

The articulation of Portuguese nasalized vowels poses some articulatory problems accompanied by negative acoustic effects for the performance of Brazilian art songs. The main objective was to find strategies that permit the singer to conciliate an idiomatic pronunciation of these vowels with a well-balanced resonance, a desirable quality in classical singing. In order to devise these strategies, the author examined sources dealing with nasalized vowels from varied perspectives: acoustic properties of vowel nasalization, phonetic and phonological aspects ofBrazilian Portuguese (BP), historical views on nasality in singing, and recent vocal pedagogy research. In addition to the overall loss of sonority, the main effect of nasalization is felt mainly in the first formant (F1) region of oral vowels, due to the introduction of nasal formants and antiformants, and to shifts in the tongue posture. Several sources report the existence of a nasality contour in BP, by which a nasalized vowel starts with an oral phase and transitions gradually to a nasal phase. The author concludes that the basic approach to sing nasalized vowels in BP is (1) to find the tongue posture corresponding to the oral vowel congener (the “core vowel”), and (2) to adjust the nasality contour in such a way that the oral portion remains prominent in order to keep the resonance balance consistent during the emission of the vowel. Once the core vowel is determined, standard vowel modification choices can be made according to voice type and the musical context in which the vowel is being sung. Some challenging excerpts from Brazilian art songs are examined, with suggestions for the application of the discussed strategies.

Orientador: Martha Herr / Coorientador: Silvia Maria Rebelo Pinho / Banca: Luiz Ricardo Basso Ballestero / Banca: Ângelo José Fernandes / Resumo: Este trabalho investiga algumas características referentes à nasalidade no canto em português brasileiro, através de um estudo sobre a articulação e representação fonética das vogais nasais neste idioma. O estudo busca auxiliar o intérprete e o professor de canto no reconhecimento e administração destas características de forma a contribuir para uma maior liberdade vocálica e definição do gesto articulatório da nasalidade no canto em português brasileiro. O trabalho consiste na organização de informações coletadas através de referências da área da voz cantada e da linguística, que evidenciam ferramentas para a reflexão sobre uma nova possibilidade de transcrição fonética das vogais nasais para o canto em português brasileiro / Abstract: This research aims to investigate the nasality in brazilian portuguese as sung, through a study about the articulation and phonetic representations of nasal vowels in this language. The study aims to assist the performer and singing teacher in the recognition and management of these features in order to contribute to greater freedom and definition of the nasality articulatory gesture in Brazilian Portuguese. This work organize information collected through referrals from the area of singing voice and linguistic, showing tools for thinking about a new possibility of phonetic transcription of nasal vowels for singing in Brazilian Portuguese / Mestre

Ph.D. / Computer Science and Electrical Engineering / Nasalization refers to the process of speech production in which significant amounts of airfow and sound energy are transmitted through the nasal tract. In phonetics, nasalization is necessary for certain phonemes to be produced in normal speech; and it can also be a normal consequence of coarticulation. In disordered speech, however, inappropriate nasalization can be one of the causes that reduces the intelligibility of speech. Instrumental measurement and analysis techniques are needed for better understanding the relationship between the physiological status and the aerodynamic and acoustic effects of nasalization during speech. The main aim of the research work presented in this dissertation is to investigate the aerodynamic and acoustic effects of nasalization, and to develop objective approaches to measure, analyze, and detect the nasalized segments in speech. Based on an extensive survey of existing literature on the measurements of velopharyngeal function, the acoustic production models of speech, the analysis methods and results of normal nasalization, and the analysis methods of resonance disorders, it is understood that the final acoustic representation of nasalization is a complex outcome that is affected by the degree of velopharyngeal opening, the variation of vocal tract configurations, the mixture of multiple acoustic channels and speaker differences. It is proposed to incorporate more available information besides single channel acoustic signals during the analysis of nasalization. In our research work, a parallel study of acoustic and aerodynamic signals reveals the complimentary information within the signals. In addition, dual-channel acoustic studies help to understand the acoustic relationship between the oral and nasal cavities, and show inherent advantages over the single-channel analysis. Based on the derivation and analysis of the dual-channel acoustic properties, automatic detectors of nasalization are developed and successfully tested. The techniques developed in these explorations provide novel instrumental and analysis approaches to possible applications such as phonetic studies of the normal nasalization process, clinical assessment of disordered nasal resonance, and special feature extraction for speech recognition.

Made available in DSpace on 2014-06-11T19:26:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-06-29Bitstream added on 2014-06-13T20:55:17Z : No. of bitstreams: 1 hannuch_sm_me_ia.pdf: 476337 bytes, checksum: cee87222ea505982ea8ce1eadac54475 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Este trabalho investiga algumas características referentes à nasalidade no canto em português brasileiro, através de um estudo sobre a articulação e representação fonética das vogais nasais neste idioma. O estudo busca auxiliar o intérprete e o professor de canto no reconhecimento e administração destas características de forma a contribuir para uma maior liberdade vocálica e definição do gesto articulatório da nasalidade no canto em português brasileiro. O trabalho consiste na organização de informações coletadas através de referências da área da voz cantada e da linguística, que evidenciam ferramentas para a reflexão sobre uma nova possibilidade de transcrição fonética das vogais nasais para o canto em português brasileiro / This research aims to investigate the nasality in brazilian portuguese as sung, through a study about the articulation and phonetic representations of nasal vowels in this language. The study aims to assist the performer and singing teacher in the recognition and management of these features in order to contribute to greater freedom and definition of the nasality articulatory gesture in Brazilian Portuguese. This work organize information collected through referrals from the area of singing voice and linguistic, showing tools for thinking about a new possibility of phonetic transcription of nasal vowels for singing in Brazilian Portuguese

Esta pesquisa investigou a nasalidade de vogais na fala espontânea de moradores das comunidades quilombolas de Brejo dos Crioulos e Poções (MG). Como aporte teórico, baseou-se nos pressupostos da Fonética e Fonologia, em estudiosos renomados na investigação da nasalidade (CAGLIARI, 1977; CÂMARA JR., 1984, 2013; BISOL, 2013; ABAURRE; PAGOTTO, 1996; SILVA, 2015), com subsídios da Linguística de Corpus. Seu objetivo geral foi investigar a ocorrência da nasalidade, no dialeto dessas comunidades quilombolas, e seu comportamento linguístico, considerando os fatores linguísticos que podem no fenômeno interferir. Especificamente, objetivou-se a) detectar a ocorrência de vogais nasalizadas com auxílio dos recursos que provê a Linguística de Corpus (Praat e WorldSmith Tolls); b) discriminar os diferentes tipos de contextos de ocorrência das vogais nasalizadas; c) fazer análises quantitativa e qualitativa das vogais nasalizadas no corpus de estudo; d) descrever e analisar o comportamento das vogais nasalizadas e; e) contrastar os valores de F1 e F2 das vogais orais e nasalizadas. Hipotetizou-se que a nasalidade acontece por ser condicionada pelo segmento nasal seguinte à vogal nasalizada – processo fonológico de “assimilação” –, sua posição quanto ao acento primário e categoria gramatical. Acreditou-se que as comunidades quilombolas de Brejo dos Crioulos e Poções produzem em suas falas vogais nasalizadas e que esse fenômeno linguístico é favorecido pela presença adjacente de consoantes ou vogais nasais. Além disso, foi hipotetizado que os valores dos F1 e F2 das vogais orais e nasalizadas nessas comunidades são distintos. Elaboraram-se as seguintes perguntas de pesquisa: (i) a presença de vogais nasalizadas na fala nessas comunidades quilombolas está condicionada à presença de um segmento sonoro nasal? (ii) o segmento sonoro nasal seguinte à vogal nasalizada favorece a ocorrência do fenômeno da nasalidade? há diferença entre os valores de F1 e F2 das vogais orais e nasalizadas nas duas comunidades quilombolas consideradas? Para compor o nosso corpus, utilizaram-se gravações de 24 entrevistas (12 locutores femininos e 12 locutores masculinos), num total de 24 participantes. Verificou-se que o segmento sonoro nasal seguinte tende a condicionar a vogal nasalizada. Geralmente, assimila-se o abaixamento do véu palatino de segmento consonantal nasal imediatamente seguinte, mas há casos de segmento vocálico nasal – assimilação regressiva; a sílaba tônica tende a favorecer a nasalidade, mas ela ocorre em posição pretônica e postônica também; os valores de F1 e F2 das vogais orais e nasalizadas nas comunidades quilombolas de Poções e Brejo dos Crioulos são distintos: o Grupo de Brejo dos Crioulos tende a produzir o F1 das vogais orais e nasalizadas mais abaixado do que o Grupo de Poções e o F2, mais anteriorizado. A nasalidade tende a ocorrer em verbos e substantivos, apesar de não ser específica a uma categoria gramatical. Esta pesquisa apontou casos de nasalização espúria, confirmando pesquisas já realizadas. Por sua vez, revelou casos de itens lexicais com contexto favorável à nasalização, mas com sua não ocorrência. Este último caso, tido como de abaixamento do véu palatino uniforme no Português Brasileiro, apresentou vogais pronunciadas sem o abaixamento do véu palatino. Ou seja, detectou-se variação no fenômeno de nasalização no Português Brasileiro. Com este trabalho, promoveu-se a discussão sobre a nasalidade, com o intuito de contribuir com os estudos linguísticos sobre o funcionamento do Português Brasileiro neste contexto geográfico. / This research investigated the nasality of vowels in the spontaneous speech of inhabitants of the quilombola communities of Brejo dos Crioulos and Poções (MG). As a theoretical framework, we based on the assumptions of Phonetics and Phonology, in renowned scholars on the investigation of nasality (CAGLIARI, 1977; CÂMARA JR., 1984, 2013; BISOL, 2013; ABAURRE; PAGOTTO, 1996; SILVA, 2015), with subsidies of the Corpus Linguistics. Its general goal was to investigate the occurrence of nasality, in the dialect of these quilombola communities, and their linguistic behavior, considering the linguistic factors that can interfere in the phenomenon. Specifically it was aimed to a) detect the occurrence of nasalized vowels with the help of the resources that the Corpus Linguistics provides (Praat and WorldSmith Tolls); b) discriminate the different types of occurring contexts of nasalized vowels; c) make quantitative and qualitative analyzes of the nasalized vowels in the study corpus; d) describe and analyze the behavior of nasalized vowels and; e) contrast the values of F1 and F2 of the oral and nasalized vowels. It was hypothesized that the nasality happens because it is conditioned by the nasal segment following the nasalized vowel - phonological process of “assimilation” - its position as the primary stress and grammatical category. It was believed that the quilombolas communities of Brejo dos Crioulos and Poções produce nasalized vowels in their speech and this linguistic phenomenon is favored by the adjacent presence of consonants or nasal vowels. Furthermore, it was hypothesized that the values of F1 and F2 of oral and nasalized vowels in these communities are distinct. The following research questions were elaborated: (i) is the presence of nasalized vowels in the speech of these quilombola communities conditioned to the presence of a nasal sound segment? (ii) does the nasal sound segment following the nasalized vowel favor the occurrence of the nasality phenomenon? is there a difference between the values of F1 and F2 of the oral and nasalized vowels in both quilombola communities considered? To compose our corpus, 24 interviews recordings were used (12 female speakers and 12 male speakers), a total of 24 participants. It was found that the following nasal sound segment tends to condition the nasalized vowel. In general, it assimilates the lowering of the soft palate of nasal consonant segment immediately following, but there are cases of nasal vowel segment - regressive assimilation; the stressed syllable tends to favor the nasality, but it occurs in pretonic and postonic position as well; F1 and F2 values of oral and nasalized vowels in the quilombola communities of Poções and Brejo dos Crioulos are distinct: the group of Brejo dos Crioulos tends to produce the F1 of oral and nasalized vowels more lowered than the group of Poções and the F2, in a more anterior position. The nasality tends to occur in verbs and nouns, although it is not specific to a grammatical category. This research found cases of spurious nasalization, confirming previous studies. In turn, it revealed cases of lexical items with favorable context for nasalization, but with its non-occurrence. This last case, considered as the lowering of the uniform soft palate in PB, presented pronounced vowels without the soft palate lowering. That is, it was detected variation in the phenomenon of nasalization in PB. With this work, it was promoted the discussion about nasality, in order to contribute to the linguistic studies about the functioning of Brazilian Portuguese in this geographical context. / Dissertação (Mestrado)