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Master's Dissertation
DOI
10.11606/D.82.2003.tde-17012005-111725
Document
Author
Full name
Maira Cristina Quirino de Souza
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2003
Supervisor
Committee
Pereira, Jose Carlos (President)
Batista Neto, João do Espírito Santo
Grellet, Marcos
Title in Portuguese
Características espectrais da nasalidade
Keywords in Portuguese
espectro vocálico e aparelho fonatório
nasalidade
parâmetros acústicos
quantificação
Abstract in Portuguese
O objetivo deste trabalho foi comparar as características espectrais de sons vocálicos quando pronunciada de maneira oral e nasal. A vogal escolhida é o /a/ sustentado por oferecer menor carga acústica para o sistema glotal. A avaliação qualitativa das diferenças entre estas vogais foi analisada através do espectro vocálico. A quantificação das diferenças foi efetuada através de parâmetros acústicos da voz – nominalmente a suavidade espectral. Os resultados encontrados demostraram que o espectro vocálico é um determinador de nasalidade eficiente por apresentar vales em freqüências características. Uma futura quantificação destes vales certamente auxiliará os especialistas da área de voz a avaliar a nasalidade contida na voz
Title in English
Spectral characteristics of nasality
Keywords in English
acoustic parameters
evaluation
nasality
system phonatory and voice
voice spectrum
Abstract in English
In this work oral and nasal voices are compared through their spectral characteristics. The chosen vowel is the sustained /a/ due to its lower acoustic load to the glottal system. The differences between both vowels have been qualitatively evaluated through their spectral. These differences were quantified by the acoustic parameter of the voice – namely the spectral flatness. Results show that the vowel spectrum is very effective determine nasality in the voice due to the valley that happens in the spectrum. A quantification of this valley will certainly help voice specialists to evaluate nasality in the voice
 
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Maira.pdf (1.02 Mbytes)
Publishing Date
2005-06-30
 
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