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	Human vocal tract models with yielding walls – preliminary experimental results Radolf, Vojtěch ; Horáček, Jaromír ; Košina, Jan Yielding walls of acoustic cavities cause an additional low frequency acoustical – mechanical resonance of the system. This resonance changes also the higher acoustic resonance frequencies. Experimental model of human vocal tract cavities with hard walls has been modified to take into account the compliance of the soft tissue of human vocal tract. The unique experimental set-up has been assembled to study in detail acoustic-structural interaction of the vocal tract cavities with a dynamical system originated in vibration of the soft tissue. The experimental results are in qualitative agreement with the results of mathematical modelling. Úplný záznam
	Acoustic resonance characteristics of the human vocal tract with respect to a soft tissue Radolf, Vojtěch ; Horáček, Jaromír A mathematical model, which can help to clarify physical background of an influence of the soft tissue of vocal cavities on the formant frequencies, has been extended. Strong acoustic-structural interaction is demonstrated on the vocal tract cavity for vowel /u:/ prolonged by a tube that is used for voice training and therapy purposes. The glottis is closed by a yielding wall, considering a mass, compliance and structural damping. Viscous losses of the acoustic cavities and radiation impedance at the output are assumed. Significant change in the first acoustic resonance frequency caused by the compliance of the soft tissue at the glottis corresponds to the data found experimentally in earlier study. Úplný záznam
	Interaction between human supraglottal space and flexible structural boundary Dedouch, K. ; Horáček, Jaromír ; Vampola, T. ; Vohradník, M. A finite element model of the male supraglottal vocal tract is investigated. Modal analysis is focused on the investigation of interaction of the supraglottal acoustic space with flexible part of the vocal tract represented by the bone of hard palate and cartilage in the larynx. Úplný záznam

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