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Numerical solution of interaction of mechanical and thermal processes at vibrations
Pešek, Luděk ; Půst, Ladislav
The contribution treats a method of solution and analysis of an interaction between thermal and mechanical processes in a vibrating non-conservative systems. Response curves of the 1DOF system containing a compliant element, made of material sensitive to temperature, are investigated. Increase of temperature is given by a loss of energy due to an internal damping in material and is influenced by a thermal convection into environs.
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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.
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