Ce travail de recherche s’inscrit dans le domaine de la phonétique clinique et relève plus particulièrement de l’intelligibilité de la parole d’enfants sourds implantés cochléaires et d’enfants normo-entendants. L’intérêt de cette thèse réside dans la comparaison des productions d’enfants sourds implantés cochléaires et d’enfants normo-entendants, appariés en âge chronologique. Nous analysons des paramètres segmentaux et suprasegmentaux en production, tels que les voyelles du français standard et les consonnes fricatives /f, s, ʃ/, l’étude du débit de parole, l’intelligibilité de mots monosyllabiques auprès d’auditeurs naïfs, ou encore l’intelligibilité de la parole semi-spontanée. Nous nous intéressons également à la façon dont les productions des enfants implantés cochléaires sont perçues par un jury d’auditeurs naïfs (n=10 ; moyenne d’âge 37 ans). Le but premier de ce travail est de mettre en avant les différences ou similitudes majeures entre nos deux groupes en fonction de l’âge chronologique des enfants mais également en fonction du recul à l’implant, du suivi rééducatif et du mode de communication. Les enfants sourds porteurs d’un implant cochléaire présentent une qualité de la voix et de la parole comparable à celle d’enfants normo-entendants de même âge chronologique, mais non similaire puisque des différences acoustiques, segmentales et supra-segmentales ont été mises en avant. Il pourrait être intéressant d’étendre cette observation aux enfants implantés précocement. / This research task falls under the field of clinical phonetics and more particularly raises of the intelligibility of the word of deaf children with cochlear implant and normal-hearing children. The interest of this thesis lies in the comparison of the productions of deaf children with cochlear implant and normal-hearing children, paired in chronological age. We analyze segmental and suprasegmental parameters in production, such as the vowels of standard French and the fricative consonants /f, S, ʃ/, the study of the speech rate of word, the comprehensibility of monosyllabic words with naive listeners, or still the comprehensibility of the semi-spontaneous word. We are also interested in the way in which the productions of the established children cochléaires are perceived by a jury of naive listeners (n=10; average age 37 years). The primary purpose of this work is to highlight the major differences or similarities between the two groups based on the chronological age of the children but also on the age back to the cochlear implant, the rehabilitative monitoring and communication mode. Deaf children with cochlear implants present a quality of the voice and word comparable with that of normal-hearing children of the same chronological age, but non similar age since differences acoustic, segmental and suprasegmental were put ahead. It might be interesting to extend this observation to early implanted children.

This work aims to investigate, from the perspective of the Acoustic Theory of Speech Production, the occurrence of palatalization of alveolar nasal from the analysis of speech data of three women born in União dos Palmares. Considering that most of the studies on palatalization in Brazil are devoted to analyzing the stops / t, d /, this study has its relevance, since it is dedicated to another segment susceptible to this process. The data was analyzed using the PRAAT computational application to describe the visual parameters in order to describe the visual parameters from the observation of the trajectory of the formants in the spectrum that can be interpreted as a lane for the point of articulation. In addition, using the R program package, we analyzed if are difference in distribution of values of frequencies of F1, F2 e F3 and we observe the interference of adjacent contexts to the alveolar nasal in the palatalization process. The results indicated the occurrence of three variants, namely: [n], [nʲ] and [ɲ]. The distinction of the variants was obtained from the observation of the frequency relation of F2 and the other frequencies, as the more the tongue approaches the palatal region, the more F2 increases. As for the influence of the phonetic environment, the upper segments seem to favor the process. / FAPEAL - Fundação de Amparo à Pesquisa do Estado de Alagoas / Este estudo tem por objetivo investigar, sob a perspectiva da Teoria Acústica da Produção da Fala, a ocorrência de palatalização da nasal alveolar a partir da análise de dados de fala de três mulheres nascidas em União dos Palmares. Considerando que grande parte dos estudos sobre palatalização no Brasil se dedica a analisar as oclusivas /t, d/, este estudo tem sua relevância, pois se dedica a outro segmento suscetível a esse processo. Os dados são analisados utilizando o aplicativo computacional PRAAT de modo a descrever os parâmetros visuais a partir da observação da trajetória dos formantes no espectro que são interpretados como pista para o ponto de articulação. Além disso, utilizando o pacote de programas R, analisamos se há diferença na distribuição dos valores das frequências de F1, F2 e F3 e observamos a interferência dos contextos adjacentes à nasal alveolar no processo de palatalização. Os resultados apontam a ocorrência de três variantes, a saber: [n], [nʲ] e [ɲ]. A distinção das variantes se deu a partir da observação da relação da frequência de F2 e as demais frequências de modo que quanto mais a língua se aproxima da região palatal, mais F2 aumenta. Quanto à influência do ambiente fonético, os segmentos altos parecem favorecer o processo.

Made available in DSpace on 2017-06-01T18:24:25Z (GMT). No. of bitstreams: 1 dissertacao_ana_carolina.pdf: 1620660 bytes, checksum: e0aa908548b1510131eddb6ac5addd3d (MD5) Previous issue date: 2008-08-11 / From the acoustic-phonetic analysis of the sounds of speech (spectrogram), this dissertation aims to describe vocalic patterns of Brazilian Portuguese (BP) in patients without larynx, held at the beginning and after four months of phonological intervention but also compare these vocalics patterns of the total laryngectomized with other standards established in vocalics subject unchanged in accordance with the standards in the studies referred by Behlau (1984), and also verify that this method of measurement of acoustic analysis through the spectrogram would be a facilitator, an action appropriate, the prognosis for the process of rehabilitation in the issuance of vocalic production of total laryngectomized with therapy instituted. The measures were analyzed acoustic frequency of formants (in Hz), and duration and intensity of vocalic production of Brazilian Portuguese (BP) in patients laryngectomized. For this study, 10 subjects were selected in treatment at the Hospital Cancer of Pernambuco, with seven males and three females, submitted to the total withdrawal of the body laryngeal. The vowels analyzed the Brazilian Portuguese were the oral, presented orally to the participants to repeat, since the majority of the participants was illiterate, combined with the on / k / injector, or facilitating the issuance esophageal and required to repeat the form of stacatto (repetition of consecutive syllable). The recordings were performed in quiet environment. The sampling rate used was 11025 Hz and resolution of 16 bits. For the realization of the acoustic analysis of the samples, were used programs Fonoview, version 1.1, Voxmetria, version 2.7 and Praat, version 4.6.22. The results were discussed and substantiated in the theory of the production of speech acoustics. The results found that the acoustic spectrografic analysis allows the tracking of acoustic parameters allowing a feedback treatment and monitoring, and a means objective and useful for the study of esophageal voice. There were figures for the frequency of acute formants, an increase of 37.29% in intensity after training phonological and shorter duration of spontaneous production of vowels and syllables as you can better control the esophagic voice , production becomes faster . From this study, it is expected that the acoustic spectrografic analysis adapted to be used in clinical practice as a reference method for the prognosis of patients totals laryngectomized in the process of phonological rehabilitation / A partir da análise fonético-acústica dos sons da fala (espectrograma), esta dissertação busca descrever os padrões vocálicos do português brasileiro (PB) em pacientes laringectomizados totais, realizada no início e após quatro meses de intervenção fonoaudiológica, como também comparar esses padrões vocálicos dos laringectomizados totais com outros padrões vocálicos estabelecidos em sujeitos sem alterações de acordo com os padrões nos estudos referidos por Behlau (1984), e ainda verificar se este método de mensuração de análise acústica através do espectrograma será ou não um facilitador, um recurso adequado, para o prognóstico no processo de reabilitação na emissão da produção vocálica dos laringectomizados totais com a terapia instituída. As medidas acústicas analisadas foram freqüência dos formantes (em Hz) e duração e intensidade da produção vocálica do português brasileiro (PB) nos pacientes laringectomizados. Para este estudo, foram selecionados 10 sujeitos em tratamento no Hospital do Câncer de Pernambuco, sendo sete do sexo masculino e três do sexo feminino, submetidos à retirada total do órgão laríngeo. As vogais analisadas do português brasileiro foram as orais, apresentadas oralmente aos participantes para repetição, já que a maioria dos participantes era de analfabetos, combinados com a consoante /k/ injetora, ou seja, facilitadora da emissão esofágica e solicitada à repetição em forma de stacatto (repetição consecutiva da sílaba). As gravações foram realizadas em ambiente silencioso. A taxa de amostragem utilizada foi de 11025 Hz e resolução de 16 bits. Para a realização da análise acústica das amostras, foram utilizados os programas Fonoview, versão 1.1, Voxmetria, versão 2.7 e o Praat, versão 4.6.22. Os resultados foram discutidos e fundamentados na teoria acústica da produção de fala. Os resultados constataram que a análise acústica espectrográfica permite o monitoramento dos parâmetros acústicos possibilitando um feedback do tratamento e o acompanhamento, sendo um meio objetivo e útil para o estudo da voz esofágica. Verificaram-se valores agudos para a freqüência dos formantes, aumento de 37,29% de intensidade após treino fonoterápico e menor duração de produção espontânea das sílabas e vogais à medida que se consegue melhor controle da voz esofagiana, a produção torna-se mais rápida. A partir desse estudo, espera-se que a análise acústica espectrográfica seja utilizada e adaptada à prática clínica como um método de referência para o prognóstico dos pacientes laringectomizados totais no processo de reabilitação fonoterápica

Diversos estudos foram realizados para detecção de patologias na laringe. Essas patologias causam alteração na frequência, amplitude e formato de onda do sinal de voz e podem ser estudadas através dos parâmetros convencionais de análise como jitter e shimmer, ou sob o enfoque da dinâmica não linear. Essas técnicas são não invasivas e servem de apoio ao especialista da área de fonoaudiologia para o diagnóstico de patologias nas pregas vocais. As técnicas de análise acústica baseiam-se no formato de onda vocal no domínio do tempo e domínio da frequência, enquanto que a técnica de análise não linear utilizada nesse trabalho baseia-se no atrator reconstruído do sinal de voz. O objetivo dessa tese é diferenciar vozes normais e patológicas e entre patologias usando a técnica de análise não linear conhecida como Seção de Poincaré. Foram analisados 48 sinais de vozes humanas, divididos em 3 grupos (16 normais, 16 com nódulo e 16 com edema de Reinke). Em seguida foram selecionados 3 trechos de 500 ms nos intervalos 0.5s-1.0s, 2.0s-2.5s e 4.0s-4.5s chamado de primeiro critério e um trecho 500ms no trecho de maior variação de pitch, chamado de segundo critério. Em seguida, o atrator foi reconstruído em 3 dimensões, determinado o atrator médio, e de cada ponto do atrator médio foi extraída a seção de Poincaré. De cada seção de Poincaré foi calculada a dispersão dos pontos do atrator no plano através da média e desvio padrão das dispersão dos pontos da seção de Poincaré em relação ao ponto médio da seção. A validação da ferramenta desenvolvida para essa tese foi realizada utilizando um sinal senoidal inserindo jitter gradativamente, onde verificou-se uma variação proporcional da média da dispersão. Os resultados obtidos mostraram que não foi possível diferenciar patologias mas foi possível classificar vozes normais das patológicas. O melhor intervalo para classificar as vozes normais das patológicas utilizando o primeiro critério foi entre 0.5s-1.0s pois nesse intervalo todas as vozes normais foram classificadas corretamente. No entanto, 6 vozes patológicas foram classificadas como normais com 2 vozes patológicas na fronteira que separa as vozes normais das patológicas. O segundo critério classificou todas as vozes normais corretamente e apenas uma voz patológica foi classificada como patológica. Concluiu-se que a ferramenta proposta utilizando o segundo critério mostrou-se superior em relação ao primeiro critério para diferenciar vozes normais das patológicas. / Several studies have been performed to detect pathologies of the larynx. These pathologies cause changes in the frequency, amplitude, and waveform of the voice signal. They can be studied by means of conventional analysis parameters such as jitter and shimmer, or from nonlinear dynamics concepts. These techniques are noninvasive and can help the speech therapist to better diagnose the pathologies in the vocal folds. The acoustic analysis techniques are based on the voice waveform in the time and frequency domains, while the non-linear analysis techniques are based on the attractor reconstructed from the speech signal.The aim of this thesis is to differentiate normal and pathological voices using a nonlinear analysis technique named Poincaré section. We analyzed 48 human voice signals divided into 3 groups (16 normal, 16 nodule and 16 Reinke\'s edema). Then, we analyzed 3 stretches of 500ms in the intervals 0.5s-1.0s, 2.0s-2.5s e 4.0-4.5s, denominated first criteria, and a stretch of 500ms in a higher variation in pitch, denominated second criteria. The attractor was then reconstructed in three dimensions, the average attractor was determined, and at each point of the average attractor, a Poincaré section was extracted. From each Poincaré section, the dispersion of the points of the attractor was calculated in the plane by means of the statistical average and standard deviation related to the medium point of the section. The validation of the tool developed for this thesis was achieved by inserting jitter gradually in a sinusoidal wave, where there was a proportional variation of average\'s dispersion was observed. The results obtained for this set of voices showed that the average and standard deviation of dispersion of the points in the Poincaré section differentiate the groups of voices, but not the pathological groups. The Statistical tests of Anova and Tukey were used to analyze the 3 groups and all group pairings, two by two, with a statistical significance of 5%. The best interval to classify normal voices from pathological voices by means of the first criteria was between 0.5s-1.0s, given the fact that in this interval, all normal voices were correctly classified. However, 6 pathological voices were classified as normal voices, with 2 voices border lining the frontier between normal voices from pathological voices. The second criteria classified all normal voices correctly, with only one pathological voice incorrectly classified. In conclusion, the second criteria tool proposed by this thesis was proven superior to differentiate normal voices from pathological ones.

The aim of this thesis is examination and verification of numeric model for solving acoustics and vibration problems. Specifically, we are speaking about cast iron plate machined from gearbox. Main objectives of this work is set of experimental and numerical analysis at this simplified part with follow-up numerical model, where same analyses examining not only structure, but especially acoustic space around were performed. Due to this we were able to compare data between experimental and numerical analyses and to be able to prove or disprove functionality and limitation of numerical model.

The level of noise and vibration of gearboxes is one of the most important parameters for today´s customers. This thesis deals with mathematical acoustic behavior modelling and its contribution to the gearbox design using finite element method. The process is presented at three computations models. Two of those were validated with experimental measurement. Acoustic analysis were performed with software FFT ACTRAN.

This diploma thesis focuses on the automated diagnosis of hypokinetic dysarthria in the multilingual speech corpus, which is a motor speech disorder that occurs in patients with neurodegenerative diseases such as Parkinson’s disease. The automatic speech recognition approach to diagnosis is based on the acoustic analysis of speech and subsequent use of mathematical models. The popularity of this method is on the rise due to its objectivity and the possibility of working simultaneously on different languages. The aim of this work is to find out which acoustic parameters have high discriminative power and are universal for multiple languages. To achieve this, a statistical analysis of parameterized speech tasks and subsequent modelling by machine learning methods was used. The analyses were performed for Czech, American English, Hungarian and all languages together. It was found that only some parameters enable the diagnosis of the hypokinetic disorder and are, at the same time, universal for multiple languages. The relF2SD parameter shows the best results, followed by the NST parameter. When classifying speakers of all the languages together, the model achieves accuracy of 59 % and sensitivity of 72 %.

No description available.

This thesis provides a comparative analysis of vowel quality in South African English (SAE) using the following data: firstly, the existing impressionistic literature on SAE and other relevant accents of English, the former of which is subject to a critical review; secondly, acoustic data from a similar range of accents, including new SAE data, collected and instrumentally analyzed specifically for the purposes of this research. These various data are used to position, on both a descriptive and theoretical level, the SAE vowel system. In addition, and in the service of providing a careful reconstruction of the linguistic history of this variety, it offers a three-stage koin´eization model which helps, in many respects, to illuminate the respective roles played by endogenous and exogenous factors in SAE’s development. More generally, the analysis is focussed on rendering explicit the extent to which the synchronic status and diachronic development of SAE more generally, and SAE vowel quality more particularly, provides support for a number of descriptive and theoretical frameworks, including those provided in Labov (1994), Torgersen and Kerswill (2004), Trudgill (2004) and Schneider (2003; 2007). With respect to these frameworks, and based on the results of the analysis, it proposes an extension to Schneider’s (2007) Dynamic Model, shows Trudgill’s (2004) model of new-dialect formation to be inadequate in accounting for some of the SAE data, provides evidence that SAE is a possibly imminent but ‘conservative’ member of Torgersen and Kerswill’s (2004) SECS-Shift and uses SAE data to question the applicability of the SECS-Shift to FOOT-Fronting. Furthermore, this thesis provides evidence that SAE has undergone an indexicallydriven arrestment of the Diphthong and Southern Shifts and a subsequent and related diffusion of GenSAE values at the expense of BrSAE ones. Similarly, it shows that SAE’s possible participation in the SECS-Shift constitutes an effective chain-shift reversal ‘from above’. It stresses that, in order to understand such phenomena, recourse needs to be made to a theory of indexicality that takes into account the unique sociohistorical development of SAE and its speakers. Lastly, the adoption of the three-stage koin´eization model mentioned above highlights the merits of considering both endogenous and exogenous factors in the historical reconstruction of new-dialect formation and, for research into SAE in particular, strengthens the case for further investigation into the possible effects of 19th-century Afrikaans/Dutch, Yiddish and north-of-English dialects on the formation of modern SAE. / Thesis (Ph.D. (English))--North-West University, Potchefstroom Campus, 2009.

This thesis provides a comparative analysis of vowel quality in South African English (SAE) using the following data: firstly, the existing impressionistic literature on SAE and other relevant accents of English, the former of which is subject to a critical review; secondly, acoustic data from a similar range of accents, including new SAE data, collected and instrumentally analyzed specifically for the purposes of this research. These various data are used to position, on both a descriptive and theoretical level, the SAE vowel system. In addition, and in the service of providing a careful reconstruction of the linguistic history of this variety, it offers a three-stage koin´eization model which helps, in many respects, to illuminate the respective roles played by endogenous and exogenous factors in SAE’s development. More generally, the analysis is focussed on rendering explicit the extent to which the synchronic status and diachronic development of SAE more generally, and SAE vowel quality more particularly, provides support for a number of descriptive and theoretical frameworks, including those provided in Labov (1994), Torgersen and Kerswill (2004), Trudgill (2004) and Schneider (2003; 2007). With respect to these frameworks, and based on the results of the analysis, it proposes an extension to Schneider’s (2007) Dynamic Model, shows Trudgill’s (2004) model of new-dialect formation to be inadequate in accounting for some of the SAE data, provides evidence that SAE is a possibly imminent but ‘conservative’ member of Torgersen and Kerswill’s (2004) SECS-Shift and uses SAE data to question the applicability of the SECS-Shift to FOOT-Fronting. Furthermore, this thesis provides evidence that SAE has undergone an indexicallydriven arrestment of the Diphthong and Southern Shifts and a subsequent and related diffusion of GenSAE values at the expense of BrSAE ones. Similarly, it shows that SAE’s possible participation in the SECS-Shift constitutes an effective chain-shift reversal ‘from above’. It stresses that, in order to understand such phenomena, recourse needs to be made to a theory of indexicality that takes into account the unique sociohistorical development of SAE and its speakers. Lastly, the adoption of the three-stage koin´eization model mentioned above highlights the merits of considering both endogenous and exogenous factors in the historical reconstruction of new-dialect formation and, for research into SAE in particular, strengthens the case for further investigation into the possible effects of 19th-century Afrikaans/Dutch, Yiddish and north-of-English dialects on the formation of modern SAE. / Thesis (Ph.D. (English))--North-West University, Potchefstroom Campus, 2009.