1. FE modelling of effect of tonsillectomy on production of Czech vowels
- Creator:
- Švancara, Pavel and Horáček, Jaromír
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- tonsillectomy, acoustics of human vocal tact, vowel production, formant frequencies, finite element method, and Liljencrants-Fant‘s glottal signal model
- Language:
- English
- Description:
- The effect of tonsillectomy on production of Czech vowels /a/ and /i/ is numerically examined. Similar experimental studies are difficult to realise on living subjects. Finite element (FE) models of the acoustic spaces corresponding to the human vocal tract for the Czech vowels /a/ and /i/ with acoustic space around the human head are used in numerical simulations of phonation. The acoustic resonant characteristics of the FE models are studied by modal and transient analyses. The production of vowels is simulated in time-domain using transient analysis of FE models excited at the position of vocal folds by analytically desctibed Liljencrants-Fant‘s (LF) glottal signal model. The results show that tonsillectomy causes frequency shifts of some formant frequencies up to 150 Hz. The frequency shift of formants significantly depends on position and size of the tonsils. and Obsahuje seznam literatury
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public