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	Volumetric model of human vocal folds Vampola, T. ; Horáček, Jaromír The article describes the vollumetric 3D FE model of real human vocal folds in a defined phonation position. The model was developed from the CT images of the plaster casts obtained by a special procedure during experiments with the excised human larynges, when the phonatioon caused by the airflow was suddenly stopped without changing the position of the fixed larynx. The model is determined for studies of dynamical stresses in the vocal fold tissue during vocal folds collisions. Detailed record
	Vliv geometrického tvaru hlasového ústrojí člověka na výslovnost českých hlásek Vampola, T. ; Horáček, Jaromír 1D and 3D finite element models of supraglottal tract designed for Czech vowel /a/ are analyzed. Performed modal analysis is focused on formant frequencies. For tuning of the human vocal tract model according to measured acoustic pressure in front of the lips the multi objective optimization method is used. Detailed record
	Finite element model of male vocal tract considering clefting and interaction between hard palate and acoustic spaces Dedouch, K. ; Horáček, Jaromír ; Vampola, T. Results of a voice numerical simulation using finite element model of acoustic spaces corresponding to the human vocal tract for English vowel /a/ are presented. The approximate FE model was designed according to the data published in literature and amended by the model the nasal tract joint with the vocal tract by compliant bone of hard palate. Detailed record
	Numerical simulation of pronunciation of vowels based on FE models of human supraglottal acoustic spaces Krampera, P. ; Horáček, Jaromír ; Dedouch, K. ; Vampola, T. Aproximate finite element models of acoustic spaces corresponding to the human vocal tract for English vowels /a/ and /i/, created according to the geometrical data published in the literature, are used for the numerical simulations. The pronunciation of the vowels /a/ and /i/ is simulated using transient analysis for the FE models. The pulse excitation of the vocal tract is realised by the time dependent displacement of a small circular plate moving at the position of the vocal folds. Detailed record
	Acoustic modal analysis of male vocal tract for Czech vowels Dedouch, K. ; Horáček, Jaromír ; Vampola, T. ; Švec, J. G. ; Kršek, P. ; Havlík, R. Acoustic frequency-modal characteristics of six finite element models of a male vocal tract are presented and analysed. The FE models correspond to the vocal tract geometries for the Czech vowels /a/, /e/, /i/, /o/, /u/ and /y/ were obtained using the magnetic resonance imaging technique. The computed results of the acoustaic modal analysis are in a reasonable agreement with the data on formants known form the Czech phonetic literature. Detailed record
	Finite element modeling of male vocal tract considering cleft palate Dedouch, K. ; Horáček, Jaromír ; Vampola, T. ; Černý, L. The FE models of vocal tract designed for vowel /a/ are analyzed considering the cleft palate. The first is designed using the published data, the second model corresponds to the reaal mate vocal tract designed by MRI data. Acoustic modal analysis is focused on investigation of the influence of the cleft palate on the formant frequencies. The results indicate, that after a small jump of the frequencies for a small cleft area the formant frequencies F1, F2 are influenced by the size of the cleft palate only very slightly. Detailed record
	Accoustic ananlysis of finite element models of supraglottal tract considering cleft palate Dedouch, K. ; Horáček, Jaromír ; Vampola, T. ; Vohradník, M. FE models of supraglottal tract for vowels /A/ and /I/ are analyzed considering the cleft palate. The modal analysis for the vowel /a/ indicate, that the formant frequencies F1 and F2 are influenced by the size of the cleft only slightly. The results Detailed record
	Design of finite element models of male vocal tract Dedouch, K. ; Horáček, Jaromír ; Vampola, T. ; Kršek, P. ; Švec, J. G. Two types FE models of vocal tract are presented. The geometry of supraglottal space, which corresponds to the English vowels was modelled fiest. However, the design of the model was very laborious thus a new procedure for direct transformation of the **ta from MRI to the finite element model was developed. Acoustic characteristics of the FE models are compared. Detailed record
	Interaction between human supraglottal space and flexible structural boundary Dedouch, K. ; Horáček, Jaromír ; Vampola, T. ; Vohradník, M. A finite element model of the male supraglottal vocal tract is investigated. Modal analysis is focused on the investigation of interaction of the supraglottal acoustic space with flexible part of the vocal tract represented by the bone of hard palate and cartilage in the larynx. Detailed record
	A note to the influence of absorptive areas on dynamic characteristics of cylindrical acoustic space Dedouch, K. ; Horáček, Jaromír ; Vampola, T. The subject of the paper is numerical FE modal analysis of cylindrical acoustic space. The absorptive areas are taken into account on the part of the boundary of the acoustic space. The influence of wall impedance on the natural frequencies, damping and modes of vibration of acoustic space is studied. Detailed record

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