|
On stability of 2D flow-field
Uruba, Václav
Stability of a 2D flow-field generated under 2D boundary conditions will be analyzed using various methods. The most practical cases of such flows are found to be highly instable and thus unphysical. The presented paper analyses the situation with help of experiments and mathematical modelling from literature defining an interesting areas for future experimental research, which could extend the published experimental studies and/or verify some recent results of mathematical modelling.
|
|
Influence of the velopharyngeal opening on human voice quality
Vampola, T. ; Horáček, Jaromír
The 3D FE models of the nasal cavities and adult female vocal tract were developed from computer tomography (CT) images for vowels /a:/ and /i:/. The interconnections between the oral and nasal cavities were created according to the anatomical literature. The acoustic frequency - modal characteristics of the FE models were studied by the modal analysis considering zero pressure at the lips and nose and the influence of velopharyngeal insufficiency on the first ten formants was evaluated.
|
| |
| |
| |