FE Modeling of Human Vocal Tract Acoustics.
Part II: Influence of Velopharyngeal Insufficiency on Phonation of Vowels

Authors: Vampola, Tomáš; Horáček, Jaromír; Vokářál, Jan; Černý, Libor

Source: Acta Acustica united with Acustica, Volume 94, Number 3, May/June 2008 , pp. 448-460(13)

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Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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Abstract:

Developed FE models of acoustic spaces of nasal and vocal tract for vowels /u:/, /a:/ and /i:/ are used to study the influence of velofaryngeal insufficiency on phonation of these vowels. Acoustics frequency-modal characteristics are studied by modal analysis and numerical simulation of acoustic signals in time domain is performed by transient analysis of the FE models. The vocal tract is excited by time dependent airflow at the position of vocal folds, and the time and frequency responses are calculated near the lips and nose. The theoretical results are partly compared with acoustic measurements on physical models designed by the rapid prototyping technique from the FE models, and by clinical investigation.

Document Type: Research article

DOI: 10.3813/AAA.918052