National Repository of Grey Literature 14 records found  previous11 - 14  jump to record: Search took 0.01 seconds. 
Experimental investigation of acoustics of a simplified physical vocal tract model for phonation of vowel /A/ by LF pulse excitation
Kryštůfek, Jan ; Vampola, T. ; Horáček, Jaromír
The paper is focused on experiment of investigation of acoustics properties of 3D simplified model of human vocal tract for phonation of vowel /a/. The physical model was excited by LF pulse and acoustic pressure was measured in specific points. Measured values were evaluated and compared with values calculated by Finite Element Method (FEM).
Influence of tonsillectomy on voice and 3D mathematical models
Vokřál, J. ; Černý, L. ; Lavička, L. ; Švancara, Pavel ; Horáček, Jaromír
After the phoniatric examination the tape-recording of voice was carried out on 14 patients (6male, 8 female, age from 16 to 39 years) in a studio. The second recording was performed appproximately 1 month after tonsillectomy. Patients phonated five Czech vowels /a:/, /e:/, /i:/, /o:/, /u:/. The acoustic analysis was performed by Multi-Dimensional Voice Program and the position of the first four formants was evaluated. The finite element (FE) models of the acoustic spaces corresponding to the human vocal tract for the Czech vowels /a:/ and /i:/ were used in the mathematical modelling. The acoustic resonant characteristics of the FE models were studied by modal and transient analyses. The acoustic analyses were realised by the software code SYSNOISE.
Akustic analysis of male vocal tract for Czech vowels
Dedouch, K. ; Švec, J. G. ; Horáček, Jaromír ; Kršek, P. ; Havlík, R. ; Vokřál, J.
The paper describes finite element models of male vocal tract designed from magnetic resonance images taken during phonation of all Czech vowels. First three formants calculated by frequency-modal analysis of the FE models are in good agreement with the data known from the Czech Phonetics.

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