Digital acoustic analysis of five vowels in maxillectomy patients

The aim of the study was to characterize the acoustics of vowel articulation in maxillectomy patients. Digital acoustic analysis of five vowels, /a/, /e/, /i/, /o/ and /u/, was performed on 12 male maxillectomy patients and 12 normal male individuals. A simple set of acoustic descriptions called the...

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Vydané v:Journal of oral rehabilitation Ročník 29; číslo 7; s. 649 - 656
Hlavní autori: Sumita, Y. I., Ozawa, S., Mukohyama, H., Ueno, T., Ohyama, T., Taniguchi, H.
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Oxford UK Blackwell Science Ltd 01.07.2002
Predmet:
Acoustics
Adult
Aged
digital acoustic analysis
Forecasting
formant
Humans
linear predictive coding
Male
Maxilla - surgery
maxillectomy
Middle Aged
Phonetics
Signal Processing, Computer-Assisted
Sound Spectrography
Speech - physiology
Speech Intelligibility
Statistics, Nonparametric
vowel
ISSN:0305-182X, 1365-2842
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Shrnutí:The aim of the study was to characterize the acoustics of vowel articulation in maxillectomy patients. Digital acoustic analysis of five vowels, /a/, /e/, /i/, /o/ and /u/, was performed on 12 male maxillectomy patients and 12 normal male individuals. A simple set of acoustic descriptions called the first and second formant frequencies, F1 and F2, were employed and calculated based on linear predictive coding. The maxillectomy patients had a significantly lower F2 for all five vowels and a significantly higher F1 for only /i/ vowel. From the data plotted on an F1–F2 plane in each subject, we determined the F1 range and the F2 range, which are the differences between the minimum and the maximum frequencies among the five vowels. The maxillectomy patients had a significantly narrower F2 range than the normal controls. In contrast, there was no significant difference in the F1 range. These results suggest that the maxillectomy patients had difficulty in controlling F2 properly. In addition, the speech intelligibility (SI) test was performed to verify the results of this new frequency range method. A high correlation between the F2 range and the score of SI test was demonstrated, suggesting that the F2 range is effective in evaluating the speech ability of maxillectomy patients.
Bibliografia:ark:/67375/WNG-HBBJ6LP2-0
istex:5B01BFD7B374BB4277D29C420CCC3A0841B71C96
ArticleID:JOOR911
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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ObjectType-Article-2
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ISSN:0305-182X
1365-2842
DOI:10.1046/j.1365-2842.2002.00911.x