Spectral findings for vowels [a] and [ã] at different velopharyngeal openings.
Pro Fono
; 22(4): 515-20, 2010.
Article
em En, Pt
| MEDLINE
| ID: mdl-21271109
BACKGROUND: The size control of velopharyngeal opening is an important variable for the acoustic profile characterization of hypernasal speech. AIM: To investigate frequency spectral aspects of F1, F2, F3, nasal formant (FN) and anti-formant, in Hertz, for vowels [a] and [ã] at different velopharyngeal openings produced in the bulb of a palatal prosthesis replica used by a patient with velopharyngeal insufficiency. METHOD: Speech recordings were obtained for four words ("pato/mato" and "panto/manto") produced within a carrier phrase in 5 conditions of velopharyngeal functioning: prosthesis with no openings (control condition: CC); prosthesis with bulb opening of 10 mm² (experimental condition with 10 mm² opening: EC10), prosthesis with a 20 mm² opening (EC20), prosthesis with a 30 mm² opening (EC30), and without the prosthesis (ECO). Five speech-language pathologists made a live rating of speech nasality during the reading of an oral passage. The recordings were used for spectral analysis. RESULTS: F1 values were significantly higher for [a] when compared to [ã] in all conditions. F2 values for [a] in EC20 and EC30 were significantly lower than values in the other conditions, being closer to the values presented for [ã]. F3 values were not significantly different between the testing conditions. There was a relationship between FN and anti-formants, and the auditory perception of nasality for conditions EC10 and EC20. CONCLUSION: Significant changes were observed in the studied spectral values according to changes in the velopharyngeal opening size.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Obturadores Palatinos
/
Acústica da Fala
/
Qualidade da Voz
/
Insuficiência Velofaríngea
Tipo de estudo:
Diagnostic_studies
Limite:
Adolescent
/
Female
/
Humans
Idioma:
En
/
Pt
Revista:
Pro Fono
Assunto da revista:
AUDIOLOGIA
/
PATOLOGIA DA FALA E LINGUAGEM
Ano de publicação:
2010
Tipo de documento:
Article
País de publicação:
Brasil