Human vocal tract resonances and the corresponding mode shapes investigated by three-dimensional finite-element modelling based on CT measurement

Vampola, Tomáš; Horáček, Jaromı́r; Laukkanen, Anne-Maria; Švec, Jan G.

doi:10.3109/14015439.2013.775333

Cited by 22 publications

(21 citation statements)

References 20 publications

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“…In vivo measurements, or computer simulations, often enhance spectacular departures from plane wave theory even at moderate frequencies (on the order of 5 kHz, Dang and Honda, 1997;El-Masri et al, 1998;Takemoto et al, 2010;Vampola et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Effects of higher order propagation modes in vocal tract like geometries

Blandin

Arnela

Laboissière

et al. 2015

The Journal of the Acoustical Society of America

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In this paper, a multimodal theory accounting for higher order acoustical propagation modes is presented as an extension to the classical plane wave theory. This theoretical development is validated against experiments on vocal tract replicas, obtained using a 3D printer and finite element simulations. Simplified vocal tract geometries of increasing complexity are used to investigate the influence of some geometrical parameters on the acoustical properties of the vocal tract. It is shown that the higher order modes can produce additional resonances and anti-resonances and can also strongly affect the radiated sound. These effects appear to be dependent on the eccentricity and the cross-sectional shape of the geometries. Finally, the comparison between the simulations and the experiments points out the importance of taking visco-thermal losses into account to increase the accuracy of the resonance bandwidths prediction.

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Section: Introductionmentioning

confidence: 99%

Effects of higher order propagation modes in vocal tract like geometries

Blandin

Arnela

Laboissière

et al. 2015

The Journal of the Acoustical Society of America

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“…Story et al (1996) did similar calculations based on magnetic resonance imaging (MRI). Differentiation between the formant frequencies and resonance frequencies of the vocal tract can be found in some papers comparing measurements from phonation (formants) to those derived from vocal tract impedance measurements or from calculations based on MRI or computer tomography (CT) data (resonance frequencies) (e.g., Stoffers et al, 2006;Vampola et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Toward a consensus on symbolic notation of harmonics, resonances, and formants in vocalization

Titze¹,

Baken

Bozeman

et al. 2015

The Journal of the Acoustical Society of America

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114

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“…Recent studies using 3D mathematical model confirmed that additional resonances caused by PS and VA can occur in the frequencyrange of 3-5 kHz, i.e., in the range which is important for the production of the so called singer's formant (ino peratic voices) [10] or speaker'sf ormant (in professional speakers) [ 11,12]. It can thus be speculated that these cavities can help in establishing a"better" voice quality in speaking and singing.…”

Section: Introductionmentioning

confidence: 96%

Modeling the Influence of Piriform Sinuses and Valleculae on the Vocal Tract Resonances and Antiresonances

Vampola¹,

Horáček²,

Švec³

2015

Acta Acustica united with Acustica

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Piriform sinuses (PS) and valleculae (VA) form the side branches of the human vocal tract and exhibit antiresonance and resonance properties which influence the produced voice quality.This study investigates the possibility of these specificresonances to contribute to the speaker'sorsinger'sformant cluster around 3-5 kHz. Areduced finite element (FE) model wascreated which allows numerical simulation of the effects of changing the volumes of PS and VA on the acoustic resonance and antiresonance characteristics of the vocal tract. This model, created from an accurate three-dimensional (3D) FE model of the human vocal tract for vowel [a:], is computationallyeffective and allows parametric changes of the size of PS and VA continuously within the physiologic range. As expected, increased sizes of both the PS and VA shift the corresponding antiresonances and resonances to lower frequencies and can alter the resulting voice spectrum. Within the antiresonance-resonance pair the PS resonance frequencyw as found lower than the antiresonance frequencyw hen the fourth vocal tract resonance frequency wasbelowthe PS antiresonance frequency. In this case, expansion of the PS size could contribute to forming a complexs inger's/speaker'sf ormant cluster and increase the radiated acoustic power in the 3-5 kHz frequency range. These changes are expected to play arole in voice therapyand operatic singing.

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Human vocal tract resonances and the corresponding mode shapes investigated by three-dimensional finite-element modelling based on CT measurement

Cited by 22 publications

References 20 publications

Effects of higher order propagation modes in vocal tract like geometries

Effects of higher order propagation modes in vocal tract like geometries

Toward a consensus on symbolic notation of harmonics, resonances, and formants in vocalization

Modeling the Influence of Piriform Sinuses and Valleculae on the Vocal Tract Resonances and Antiresonances

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