Analyses of vocal tract cross-distance to area mapping: An investigation of a set of vowel images

McGowan, Richard S.; Jackson, Michel T. T.; Berger, Michael A.

doi:10.1121/1.3665988

Cited by 8 publications

(4 citation statements)

References 19 publications

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“…Attention is paid to the fact that two consecutive tubelets cannot cross in high curvature regions of the vocal tract. Recovering the third dimension from the 2D information, namely the midsagittal distance and the length of each tubelet, in order to estimate the area function has given rise to a number of works [35][36][37] . However, the improvement with Role of glottal abductions in fricatives (Version by the authors) respect to methods derived from that proposed by Heinz and Stevens 38 is not very marked.…”

Section: Glottis Model With a Membranous Glottal Gapmentioning

confidence: 99%

Acoustic impact of the gradual glottal abduction degree on the production of fricatives: A numerical study

Elie

Laprie

2017

The Journal of the Acoustical Society of America

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The paper presents a numerical study about the acoustic impact of the gradual glottal opening on the production of fricatives. Sustained fricatives are simulated by using classic lumped circuit element methods to compute the propagation of the acoustic wave along the vocal tract. A recent glottis model is connected to the wave solver to simulate a partial abduction of the vocal folds during their self-oscillating cycles. Area functions of fricatives at the three places of articulation of French have been extracted from static MRI acquisitions. Simulations highlight the existence of three distinct regimes, named A, B, and C, depending on the degree of abduction of the glottis. They are characterized by the frication noise level: A exhibits a low frication noise level, B, which is a transitional unstable regime, is a mixed noise/voice signal, and C contains only frication noise. They have significant impacts on the first spectral moments. Simulations show that their boundaries depend on articulatory and glottal configurations. The transition regime B is shown to be unstable: it requires very specific configurations in comparison with other regimes, and acoustic features are very sensitive to small perturbations of the glottal configuration abduction in this regime.

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Section: Glottis Model With a Membranous Glottal Gapmentioning

confidence: 99%

Acoustic impact of the gradual glottal abduction degree on the production of fricatives: A numerical study

Elie

Laprie

2017

The Journal of the Acoustical Society of America

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“…The determination of optimal methods to predict the cross-sectional area gave rise to a number of works. The recent work of Mc-Gowan et al [17] approximates the cross-sectional areas from known MRI data whose global sagittal cross-distance profile is close to that searched. However, the benefit is only marginal all the more so since a set of MRI images of the target speaker is required.…”

Section: Recovering the Cross-sectional Areamentioning

confidence: 93%

Articulatory copy synthesis from cine x-ray films

Laprie¹,

Loosvelt²,

Maeda

et al. 2013

Interspeech 2013

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This paper deals with articulatory copy synthesis from X-ray films. The underlying articulatory synthesizer uses an aerodynamic and an acoustic simulation using target area functions, F0 and transition patterns from one area function to the next as input data. The articulators, tongue in particular, have been delineated by hand or semi-automatically from the X-ray films. A specific attention has been paid on the determination of the centerline of the vocal tract from the image and on the coordination between glottal area and vocal tract constrictions since both aspects strongly impact on the acoustics. Experiments show that good quality speech can be resynthesized even if the interval between two images is 40 ms. The same approach could be easily applied to cine MRI data.

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“…5 shows an example of air-tissue boundaries produced by this algorithm. Obtaining such vocal tract contours enables the calculation of vocal-tract midsagittal cross-distances, which in turn can be used to estimate area functions, via standard reference sagittal-to-area transformations [40–42]. …”

Section: Data Analysis Toolsmentioning

confidence: 99%

“…The symbol "s" stands for "space". be used to estimate area functions, via standard reference sagittal-to-area transformations [40][41][42].…”

Section: B) Automatic Articulator Trackingmentioning

confidence: 99%

Advances in real-time magnetic resonance imaging of the vocal tract for speech science and technology research

Toutios

Narayanan

2016

SIP

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Real-time magnetic resonance imaging (rtMRI) of the moving vocal tract during running speech production is an important emerging tool for speech production research providing dynamic information of a speaker's upper airway from the entire mid-sagittal plane or any other scan plane of interest. There have been several advances in the development of speech rtMRI and corresponding analysis tools, and their application to domains such as phonetics and phonological theory, articulatory modeling, and speaker characterization. An important recent development has been the open release of a database that includes speech rtMRI data from five male and five female speakers of American English each producing 460 phonetically balanced sentences. The purpose of the present paper is to give an overview and outlook of the advances in rtMRI as a tool for speech research and technology development.

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Analyses of vocal tract cross-distance to area mapping: An investigation of a set of vowel images

Cited by 8 publications

References 19 publications

Acoustic impact of the gradual glottal abduction degree on the production of fricatives: A numerical study

Acoustic impact of the gradual glottal abduction degree on the production of fricatives: A numerical study

Articulatory copy synthesis from cine x-ray films

Advances in real-time magnetic resonance imaging of the vocal tract for speech science and technology research

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