Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 50 for “"Vocal tract"”.
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An analog VLSI vocal tract
… the first experimental integrated-circuit vocal tract by mapping fluid volume velocity to current, fluid pressure to voltage, and linear and nonlinear mechanical impedances to linear and nonlinear electrical impedances. The 275 jW analog vocal tract chip can be used with auditory processors …
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Turbulent noise sources in vocal tract models
Thesis (Elec. E. and M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1988.
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Unsupervised learning of vocal tract sensory-motor synergies
… factor analysis for control of a simulated vocal tract is presented here. This framework is shown to mirror the articulatory phonology model of speech production and evidence is provided that articulatory gestures arise from learning an optimal encoding of vocal tract dynamics. Broad …
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High-resolution full-vocal-tract dynamic speech magnetic resonance imaging
… high-resolution dynamic speech MRI with full-vocal-tract coverage and phonetically meaningful interpretation remains a challenging goal for many speech researchers. This dissertation develops novel model-based dynamic speech MRI approaches to enable high-resolution, full-vocal-tract 3D dynamic …
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Estimation of the vocal tract shape from the acoustic waveform.
Thesis. 1976. Ph.D.--Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
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A quasi-one-dimensional digital simulation for the time-varying vocal tract.
Massachusetts Institute of Technology. Dept. of Electrical Engineering. Thesis. 1973. Elec.E.
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Investigating Speaker Features From Very Short Speech Records
A procedure is presented that is capable of extracting various speaker features, and is of particular value for analyzing records containing single words and shorter segments of speech. By taking advantage of the fast convergence properties of adaptive filtering, the approach is capable of modeling …
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Laryngeal-Level Amplitude Modulation in Vibrato
Research in vocal vibrato has established that vocal tract filtering is primarily responsible for the amplitude modulation (AM) present in Western classical vibrato. Using electroglottography (EGG) and the EGG speed quotient, which is sensitive to fluctuations in the amplitude of vocal fold …
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Acoustic characterization of the glides /j/ and /w/ in American English
… were performed on a recorded database of intervocalic glides, produced naturally by two male and two female speakers in controlled vocalic and prosodic contexts. Glides were found to differ significantly from adjacent vowels through RMS amplitude reduction, first formant frequency reduction, …
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Formant Deflection Directions of the Voiced Alveolar Stop Consonant in Different Vowel Contexts
A parametric model of the vocal tract area function was used to synthesize a series of alveolar stop consonant constrictions imposed on nine /VV/ transitions (e.g., /idae/). The constrictions differed in spatial characteristics, places of occurrence along the vocal tract length, and the onset and …
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A sample selective linear predictive analysis of speech signals
… speech. But it has problems in estimating the vocal tract characteristics of voiced sounds uttered by females and children. This is because the conventional linear prediction method assumes that all the sample values in each analysis frame are to be approximated by a linear combination of a …
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The Physics of Rodent Ultrasonic Vocalizations
… much work has been done on the physics of vocalizations caused by the vibrating motion of vocal folds, relatively little work has been done on the physics of ultrasonic vocalizations (USVs). There are two orders of mammals known to make these kind of vocalizations: cetaceans and rodents. Of …
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Modelling the emergence of a basis for vocal communication between artificial agents
… learning to control an articulatory model of the vocal tract and perceiving the resulting signal through a biologically plausible artificial auditory system. By firmly establishing each aspect of our model in current phonetic theory, we are able to make useful claims and justify our inevitable …
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Exploration of Lip Shape Measures and their Association with Tongue Contact Patterns
… been developed to measure the movements of the vocal tract, specifically of the tongue and lips. In recent years, computer technology has allowed for extensive exploration of these precise movements and for the development of speech recognition systems. However, there has been relatively little …
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Supralaryngeal Articulator Movements and Laryngeal Control in Mandarin Chinese Tonal Production
… and the laryngeal systems. The influence of vocal tract configuration on F0 of vowels was noted for all participants. However, not all participants demonstrated the influence of F0 control on vowel quality. Similarly, articulatory compensation was not noted for all participants for tongue …
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Dynamic Acoustic -Articulatory Relations
… area function change only at locations in the vocal tract where a linguistic task is specified. The patterns are a dynamic expression of this constraint. Simulation of acoustic tube models will then show how the acoustic consequences of area function change at the linguistically specified …
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The Aging Female Voice: Medical Treatments and Pedagogical Techniques For Combatting the Effects of Aging With Emphasis On Menopause
… of menopause. Estrogen deprivation causes vocal changes including hoarseness, breathiness and a reduction in range. In addition, a swelling of the vocal folds and changes in the amount and consistency of the mucous membranes lining the vocal tract are all concerns. Although it is impossible …
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Implementation of a Connected Digit Recognizer Using Continuous Hidden Markov Modeling
… signal to model the characteristics of the vocal tract filter. A 7 state continuous HMM with 4 mixture density components was used to model each digit. The Viterbi reestimation method was primarily used in the training phase to obtain the parameters of the HMM. Viterbi decoding was used for …
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The Music Muse
… in singing? It is a completely biased and abstract concept. To some, Bob Dylan1s voice may epitomize tonal beauty, while to others his voice may be comparable to fingernails on a chalk board. Anyway, differences in tone quality, or timbre, are due to differences in the spectral characteristics …
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