Contrastes e contrastes encobertos na produção da fala de crianças

Berti, Larissa Cristina

doi:10.1590/s0104-56872010000400029

Cited by 10 publications

(17 citation statements)

References 9 publications

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“…The observation of attempts of correct production of sounds, verified via spectrogram and, which were not previously identified by auditory perceptual analysis, has already been reported and confirmed by many studies of the area 1,5,6,10,11,[15][16][17][18] . A research 5 that also investigated the voicing contrast of the stop phones found that a group of children with speech and difficulty in stabilizing the feature [+ voice] did not distinguish acoustically the voiced x voiceless contrast.…”

Section: Discussionsupporting

confidence: 65%

“…That fact seems to be confirmed in another theoretical perspective through the covert contrast [15][16][17][18][19] . For the discrimination of voicing contrast, it was observed in this research that only one of the children had a low performance in the SVDT, with a percentage of less than 50% of correct answers.…”

Section: Figure 4 -Errors Total By Minimal Pairs In the Stop Voicinmentioning

confidence: 60%

“…The introduction of acoustic spectrography in data interpretation of children with phonological disorders, has increasingly established itself as a practical and necessary tool during the speech assessment [1][2][3][4][5][6][7]10,11,[15][16][17][18] . The observation of attempts of correct production of sounds, verified via spectrogram and, which were not previously identified by auditory perceptual analysis, has already been reported and confirmed by many studies of the area 1,5,6,10,11,[15][16][17][18] .…”

Section: Discussionmentioning

confidence: 99%

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Produção e discriminação do contraste de sonoridade das plosivas nos casos de desvio fonológico

et al. 2015

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O contraste de sonoridade das plosivas representa uma complexa coordenação acústica e articulatória, muitas vezes prejudicada nos desvios fonológicos. Por esse motivo, acredita-se que esforços devem ser realizados no sentido de melhor entender os fatores que influenciam na estabilização desse contraste. Assim, o objetivo desta pesquisa foi correlacionar os dados de produção e o desempenho em um teste de discriminação do traço [+voz] em crianças com desvio fonológico. Para isso foram avaliados cinco meninos com desvio fonológico e dificuldade na produção das plosivas sonoras, entre outras dificuldades de fala. Por meio de pares de palavras inseridos em frase-veículo, observou-se a ocorrência de produção de Voice Onset Time positivo durante a produção de plosivas [+voz] e o padrão de duração das vogais adjacentes às plosivas surdas e sonoras. Elaborou-se um Teste de Discriminação de Sonoridade das Plosivas, a fim de se avaliar o desempenho dos sujeitos em relação à discriminação. O teste consiste de 12 pares de palavras, diferenciados apenas pelo contraste [+voz] e representados por figuras. Na análise descritiva, não se verificou uma relação direta entre dificuldade de produção do contraste de sonoridade das plosivas e discriminação auditiva desses segmentos, tanto na observação da produção de pré-sonoridade, quanto na observação da produção do padrão de duração das vogais. Mesmo assim, salienta-se que o emprego de uma avaliação de discriminação, bem como, de análise acústica nos casos de desvio fonológico, não devem ser desprezados pelos fonoaudiólogos, uma vez que esses instrumentos podem fornecer informações fundamentais para um bom progresso terapêutico.

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Section: Discussionsupporting

confidence: 65%

Section: Figure 4 -Errors Total By Minimal Pairs In the Stop Voicinmentioning

confidence: 60%

Section: Discussionmentioning

confidence: 99%

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Produção e discriminação do contraste de sonoridade das plosivas nos casos de desvio fonológico

et al. 2015

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“…Speech data from all individuals were collected and submitted to acoustic analysis. variables present in the production of fricatives, because, in this way, the production of all individuals would have the same target (9)(10)(11)(12)(13)(14)(15)(16) . The only exception was the variable word position, which was a target of this study.…”

Section: Thismentioning

confidence: 99%

Características acústicas dos fones [s] e [∫] de adultos e crianças com desenvolvimento fonológico típico

Brasil

Mezzomo

Mota

et al. 2012

Rev. soc. bras. fonoaudiol.

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Subjects underwent speech-language pathology and audiology screening, and then data collection for acoustic analysis. For acoustic analysis, pseudowords in carrier phrases were used. We analyzed 624 productions from the subjects, and the results were statistically analyzed. Results: The parameters frequency band of higher concentration of noise and formant transition of the following vowel presented differences between groups. In the comparison between word positions, the parameters duration and cutoff frequency of fricative noise, and formant transition of the following vowel presented differences. The parameters frequency band of higher concentration of noise, cutoff frequency of friction noise, and formant transition of the following vowel showed statistical differences in the comparison between the points of articulation of [s] and [S]. Conclusion: For most of the studied acoustic parameters, children's and adults' productions were similar. However, for some parameters, differences were observed between groups, word positions, and pois of articulation of the phonemes [s] and [S].

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“…Phonetically speaking, the lack of adaptation to the production might occur due to children's problems involving acquisition and/or manipulation of acoustic cues (SCOBBIE et al, 2000;BERTI;MARINO, 2011). Children may resort to phonetically inappropriate cues for a given language (that is, inappropriate use of acoustic cues) and/or may use appropriate phonetic cues for the given language, but with an unexpected magnitude: with insufficient or exaggerated values, characterizing the so-called covert contrasts (SCOBBIE et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Estabelecimento Do Contraste Entre as Fricativas Por Crianças Com Transtorno Fonológico: Manipulação De Pistas Acústicas

Corrêa

Berti

2015

Alfa, rev. linguíst. (São José Rio Preto)

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• ABSTRACT: The present study focuses on the presence of covert contrasts in the speech of children with a phonological disorder. The hypothesis is that children with phonological disorders manipulate secondary acoustic cues in an attempt to distinguish the phonological contrasts. We used five audio recordings of the speech of five children with speech disorders, between four and five years of age, who showed the so-called "phonic substitution" involving the sound group of the fricatives. The data were edited and analyzed using the software PRAAT. A phonetic transcription of the first repetition of each child was performed by three evaluators, reaching a 66% agreement level. After the transcription, we carried out a contrastive phonological analysis of the production of the five children and, finally, an acoustic analysis of all the "substitutions", based on six parameters. We discovered the existence of covert contrasts in the productions auditorily regarded as homophones by the evaluators, representing a total of 54% of total substitutions identified through an impressionistic approach by the evaluators. Children with phonological disorders are seen to rely on secondary acoustic cues in an attempt to distinguish fricative phonemes. The data obtained in this study allow us to reflect on the importance of considering the phonetic detail within the phonological models.•

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Contrastes e contrastes encobertos na produção da fala de crianças

Cited by 10 publications

References 9 publications

Produção e discriminação do contraste de sonoridade das plosivas nos casos de desvio fonológico

Produção e discriminação do contraste de sonoridade das plosivas nos casos de desvio fonológico

Características acústicas dos fones [s] e [∫] de adultos e crianças com desenvolvimento fonológico típico

Estabelecimento Do Contraste Entre as Fricativas Por Crianças Com Transtorno Fonológico: Manipulação De Pistas Acústicas

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