Parâmetros acústicos do contraste de sonoridade das plosivas no desenvolvimento fonológico típico e no desviante

Melo, Roberta Michelon; Mota, Helena Bolli; Mezzomo, Carolina Lisbôa; Brasil, Brunah de Castro; Lovatto, Liane; Arzeno, Leonardo

doi:10.1590/s1516-80342012000300012

Cited by 5 publications

(11 citation statements)

References 16 publications

(27 reference statements)

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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. However, even though children with phonological disorders have not submitted to a differentiation of voicing through the investigated acoustic parameters (VOT, length of the vowel, length of the occlusion and burst amplitude), those ones showed a tendency to anchor on clues that are less robust during the attempt of implementing that contrast.…”

Section: Discussionsupporting

confidence: 66%

“…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%

“…The distinction between voiceless and voiced and stops is acoustically marked by the absence or presence of absence or presence of pre-voicing or voicing concomitant to burst, i.e., by a positive, negative or zero Voice Onset Time (VOT) [1][2][3] . In addition to VOT, other acoustic signals are also mentioned as being responsible for establishing the voicing contrast, among them, the length of the vowel adjacent to stop 2,4,5 , to burst amplitude 1,5,6 and length of the occlusion preceding to burst 4,5,7 . The voicing contrast of stops involves, therefore, a complex temporal-spatial coordination of oral and laryngeal gestures.…”

Section: Scholarship Agency: Fapergs/capes (Doctorate Scholarship)mentioning

confidence: 99%

“…The voicing contrast of stops involves, therefore, a complex temporal-spatial coordination of oral and laryngeal gestures. Such articulatory and acoustic refinement is a hard task for some children with phonological disorders 3,5 and, in addition to impairing also to two schools of public schools in the same city.…”

Section: Scholarship Agency: Fapergs/capes (Doctorate Scholarship)mentioning

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: 66%

Section: Discussionmentioning

confidence: 99%

Section: Scholarship Agency: Fapergs/capes (Doctorate Scholarship)mentioning

confidence: 99%

Section: Scholarship Agency: Fapergs/capes (Doctorate Scholarship)mentioning

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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“…Acoustic analysis of speech and voice has been used for a long time as tool for analysis of altered cases, for promoting more accurate diagnoses, and as the monitoring procedure of the therapeutic process, both by speech language pathologist and by the patient (1)(2)(3)(4) . The articulatory analysis in the area of speech and orofacial motricity emerges as a new possibility, especially at the national level (5)(6)(7)(8)(9)(10) , for integration of these analyses already mentioned, using, for example, the ultrasonography for evaluation of tongue movements (11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22) , and of the hyoid bone (19,(23)(24)(25)(26)(27) , without inserting devices within the oral cavity.…”

Section: Introductionmentioning

confidence: 99%

Ultrasound applicability in Speech Language Pathology and Audiology

Barberena

Brasil

Melo

et al. 2014

CoDAS

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PURPOSE: To present recent studies that used the ultrasound in the fields of Speech Language Pathology and Audiology, which evidence possibilities of the applicability of this technique in different subareas. RESEARCH STRATEGY: A bibliographic research was carried out in the PubMed database, using the keywords "ultrasonic," "speech," "phonetics," "Speech, Language and Hearing Sciences," "voice," "deglutition," and "myofunctional therapy," comprising some areas of Speech Language Pathology and Audiology Sciences. The keywords "ultrasound," "ultrasonography," "swallow," "orofacial myofunctional therapy," and "orofacial myology" were also used in the search. SELECTION CRITERIA: Studies in humans from the past 5 years were selected. In the preselection, duplicated studies, articles not fully available, and those that did not present direct relation between ultrasound and Speech Language Pathology and Audiology Sciences were discarded. DATA ANALYSIS: The data were analyzed descriptively and classified subareas of Speech Language Pathology and Audiology Sciences. The following items were considered: purposes, participants, procedures, and results. RESULTS: We selected 12 articles for ultrasound versus speech/phonetics subarea, 5 for ultrasound versus voice, 1 for ultrasound versus muscles of mastication, and 10 for ultrasound versus swallow. Studies relating "ultrasound" and "Speech Language Pathology and Audiology Sciences" in the past 5 years were not found. CONCLUSION: Different studies on the use of ultrasound in Speech Language Pathology and Audiology Sciences were found. Each of them, according to its purpose, confirms new possibilities of the use of this instrument in the several subareas, aiming at a more accurate diagnosis and new evaluative and therapeutic possibilities.

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Cognitive Auditory Evoked Potential in children with speech sound disorders: analysis of different verbal stimuli

et al. 2019

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Objective: to analyze the influence of different combinations of verbal stimuli on the responses of the cognitive auditory evoked potential of children with speech sound disorders and to compare the P300 responses, considering the combinations of stimuli in the different severity of speech sound disorders. Methods: nineteen children in the mean age of 6.75 years old, of both sexes, diagnosed with speech sound disorder, participated in the study. All participants were submitted to the cognitive auditory evoked potential-P300 test, performed with two combinations of verbal stimuli (BA/DI and BA/GA). For statistical analysis it was used the Student T-test. Results: a statistically significant difference was observed for the latency values (p=<0.001*) and for the amplitude values (p=<0.001*) between the two combinations of stimuli. Also, statistically significant difference was observed between the combinations evaluated in the different severity of the speech sound disorder. Conclusion: the combination of stimuli /BA/ x /DI/ demonstrated lower latency and higher amplitude values in the Cognitive Evoked Potential assessment in children presented with speech sound disorder.

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Parâmetros acústicos do contraste de sonoridade das plosivas no desenvolvimento fonológico típico e no desviante

Cited by 5 publications

References 16 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

Ultrasound applicability in Speech Language Pathology and Audiology

Cognitive Auditory Evoked Potential in children with speech sound disorders: analysis of different verbal stimuli

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