Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 3 de 3
Filtrar
Mais filtros










Intervalo de ano de publicação
1.
Acta otorrinolaringol. esp ; 69(3): 134-140, mayo-jun. 2018. graf, tab
Artigo em Espanhol | IBECS | ID: ibc-180680

RESUMO

INTRODUCCIÓN Y OBJETIVOS: En los últimos años se ha incrementado el uso de medidas cepstrales para la evaluación acústica de la voz. Uno de los parámetros más investigados es la prominencia del pico cepstral suavizado (CPPs). Los objetivos de este trabajo son conocer la utilidad de esta medida acústica en la evaluación objetiva de las alteraciones de la voz en español y determinar qué tipo de muestra de voz (vocales sostenidas o habla conectada) es la más sensible para evaluar la severidad de la disfonía. MÉTODO: En este estudio participaron 40 sujetos, 20 normofónicos y 20 con disfonía. Se grabaron 2 muestras de voz para cada sujeto (una/a/sostenida y 4 frases fonéticamente balanceadas) y se calculó la CPPs con el programa Praat. Tres expertos valoraron perceptivamente la voz de la muestra con el parámetro grado de la escala GRABS. RESULTADOS: Se encontraron valores significativamente menores en las voces disfónicas, tanto para la/a/(t[38] = 4,85, p < 0,000) como para las frases (t[38] = 5,75, p < 0,000). En relación con el tipo de muestra de voz más indicado para evaluar la severidad de las alteraciones de la voz se encontró una fuerte correlación con la escala acústico-perceptiva de la CPPs calculada a partir del habla conectada (rs = -0,73) y moderada con la calculada a partir de la vocal sostenida (rs= -0,56). CONCLUSIÓN: Los resultados de este estudio preliminar apuntan a que la CPPs es una buena medida para detectar la disfonía y para evaluar objetivamente el grado de severidad de las alteraciones en la voz


INTRODUCTION AND OBJECTIVES: In recent years, the use of cepstral measures for acoustic evaluation of voice has increased. One of the most investigated parameters is smoothed cepstral peak prominence (CPPs). The objectives of this paper are to establish the usefulness of this acoustic measure in the objective evaluation of alterations of the voice in Spanish and to determine what type of voice sample (sustained vowels or connected speech) is the most sensitive in evaluating the severity of dysphonia. METHOD: Forty subjects participated in this study 40, 20 controls and 20 with dysphonia. Two voice samples were recorded for each subject (one sustained vowel/a/and four phonetically balanced sentences) and the CPPs was calculated using the Praat programme. Three raters perceptually evaluated the voice sample with the Grade parameter of GRABS scale. RESULTS: Significantly lower values were found in the dysphonic voices, both for/a/(t[38] = 4.85, P < .000) and for phrases (t[38] = 5,75, P < .000). In relation to the type of voice sample most suitable for evaluating the severity of voice alterations, a strong correlation was found with the acoustic-perceptual scale of CPPs calculated from connected speech (rs = -0.73) and moderate correlation with that calculated from the sustained vowel (rs = -0,56). CONCLUSION: The results of this preliminary study suggest that CPPs is a good measure to detect dysphonia and to objectively assess the severity of alterations in the voice


Assuntos
Humanos , Masculino , Feminino , Adulto , Disfonia/diagnóstico , Fala , Acústica da Fala , Voz , 28599 , Distúrbios da Voz/patologia
2.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-28867553

RESUMO

INTRODUCTION AND OBJECTIVES: In recent years, the use of cepstral measures for acoustic evaluation of voice has increased. One of the most investigated parameters is smoothed cepstral peak prominence (CPPs). The objectives of this paper are to establish the usefulness of this acoustic measure in the objective evaluation of alterations of the voice in Spanish and to determine what type of voice sample (sustained vowels or connected speech) is the most sensitive in evaluating the severity of dysphonia. METHOD: Forty subjects participated in this study 40, 20 controls and 20 with dysphonia. Two voice samples were recorded for each subject (one sustained vowel/a/and four phonetically balanced sentences) and the CPPs was calculated using the Praat programme. Three raters perceptually evaluated the voice sample with the Grade parameter of GRABS scale. RESULTS: Significantly lower values were found in the dysphonic voices, both for/a/(t[38]= 4.85, P<.000) and for phrases (t[38] = 5,75, P<.000). In relation to the type of voice sample most suitable for evaluating the severity of voice alterations, a strong correlation was found with the acoustic-perceptual scale of CPPs calculated from connected speech (rs = -0.73) and moderate correlation with that calculated from the sustained vowel (rs = -0,56). CONCLUSION: The results of this preliminary study suggest that CPPs is a good measure to detect dysphonia and to objectively assess the severity of alterations in the voice.


Assuntos
Disfonia/diagnóstico , Acústica da Fala , Fala , Voz , Adulto , Feminino , Humanos , Masculino , Espanha
3.
Rev. logop. foniatr. audiol. (Ed. impr.) ; 36(2): 71-76, abr.-jun. 2016. tab, graf
Artigo em Espanhol | IBECS | ID: ibc-152478

RESUMO

Las transiciones representan el movimiento del tracto vocal desde la configuración articulatoria de la consonante a la de la vocal. El análisis acústico de la velocidad de estas transiciones en el segundo formante es un procedimiento utilizado en la evaluación e investigación del habla disártrica, ya que aporta información sobre los movimientos de la lengua en la articulación. El objetivo de este trabajo es estudiar los valores de la velocidad de las transiciones en diptongos a través de las pendientes del segundo formante y establecer su relación con la severidad de la disartria. Participaron 12 sujetos con disartria atáxica y 10 neurológicamente sanos. Se obtuvieron las características de las transiciones del segundo formante en los diptongos de las palabras causa, piojo y tierra, y se estudió la relación de las pendientes con los valores obtenidos en la escala de inteligibilidad para alteraciones motoras del habla. Los resultados muestran pendientes significativamente menores en el grupo disártrico en las transiciones de los diptongos de las 3 palabras estudiadas. En relación a la severidad de la disartria, se encontraron correlaciones altas con la escala de inteligibilidad utilizada. El análisis acústico de la velocidad de las transiciones del segundo formante ha demostrado ser una herramienta útil en la evaluación objetiva de la disartria. Proporciona información sobre la severidad de las alteraciones motoras del habla y aporta datos objetivos sobre la progresión de la terapia logopédica (AU)


Transitions represent the vocal tract movement of the articulatory configuration from the consonant to the vowel. The acoustic analysis of the velocity of these transitions in the second-formant is a procedure used in the evaluation and investigation of dysarthric speech, as it provides information on the movements of the tongue in the joint. The aim of this work is to study the values of the speed of the transitions in diphthongs through the second-formant slopes and establish their relationship with the severity of dysarthria. Twelve subjects with ataxic dysarthria and ten neurologically healthy subjects participated. The characteristics of the second-formant transitions were obtained in the diphthongs of the words causa, piojo and tierra, and a study was made of the relationship of the slopes with the values obtained in the scale of intelligibility for speech motor disorders. The results show slopes significantly lower in the dysarthric group in the transitions of the diphthongs of the three words studied. As regards the severity of dysarthria, high correlations were found with the intelligibility scale used. Acoustic analysis of the speed of the second formant transitions has proved a useful tool in the objective assessment of dysarthria. It provides information about the severity of motor speech disorders and gives objective data on the progression of speech therapy (AU)


Assuntos
Humanos , Masculino , Feminino , Pessoa de Meia-Idade , Distúrbios da Fala/diagnóstico , Distúrbios da Fala/terapia , Inteligibilidade da Fala/fisiologia , Inteligibilidade da Fala/efeitos da radiação , Medida da Produção da Fala/instrumentação , Medida da Produção da Fala/métodos , Disartria/diagnóstico , Disartria/terapia , Audiometria da Fala/métodos , Acústica da Fala , Disartria/epidemiologia , Disartria/fisiopatologia , Grupos Controle , Audiologia/métodos , Audiologia/estatística & dados numéricos , Fonoaudiologia/métodos
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...