Human vocal tract resonances and the corresponding mode shapes investigated by three-dimensional finite-element modelling based on CT measurement
Jazyk angličtina Země Anglie, Velká Británie Médium print-electronic
Typ dokumentu časopisecké články, práce podpořená grantem
- Klíčová slova
- Acoustic mode shapes of vibration, biomechanics of human voice, speaker's and singer's formant, voice production modelling,
- MeSH
- akustika řeči * MeSH
- akustika MeSH
- analýza metodou konečných prvků MeSH
- anatomické modely * MeSH
- biologické modely * MeSH
- biomechanika MeSH
- časové faktory MeSH
- fonace * MeSH
- glottis diagnostické zobrazování fyziologie MeSH
- kvalita hlasu * MeSH
- lidé MeSH
- měření tvorby řeči MeSH
- numerická analýza pomocí počítače MeSH
- počítačová rentgenová tomografie * MeSH
- počítačová simulace * MeSH
- rentgenový obraz - interpretace počítačová MeSH
- tlak MeSH
- vibrace MeSH
- zvuková spektrografie MeSH
- Check Tag
- lidé MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
Resonance frequencies of the vocal tract have traditionally been modelled using one-dimensional models. These cannot accurately represent the events in the frequency region of the formant cluster around 2.5-4.5 kHz, however. Here, the vocal tract resonance frequencies and their mode shapes are studied using a three-dimensional finite element model obtained from computed tomography measurements of a subject phonating on vowel [a:]. Instead of the traditional five, up to eight resonance frequencies of the vocal tract were found below the prominent antiresonance around 4.7 kHz. The three extra resonances were found to correspond to modes which were axially asymmetric and involved the piriform sinuses, valleculae, and transverse vibrations in the oral cavity. The results therefore suggest that the phenomenon of speaker's and singer's formant clustering may be more complex than originally thought.
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