Conference Paper

Adding fricatives to the portuguese articulatory synthesiser.

Conference: 8th European Conference on Speech Communication and Technology, EUROSPEECH 2003 - INTERSPEECH 2003, Geneva, Switzerland, September 1-4, 2003
Source: DBLP
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Available from: António J S Teixeira, Oct 05, 2015
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    ABSTRACT: Magnetic resonance images of the vocal tract during sustained production of the fricatives /s, integral, f, theta, z, 3 v, 0/ by four subjects are analyzed. Measurements of vocal-tract lengths and area functions, and morphological analyses of the vocal tract and tongue shapes for these sounds are presented. Interspeaker differences in area functions are found to be greater in the pharyngeal cavity than in the buccal cavity with the nonstrident fricatives exhibiting greater differences than the strident ones. The anterior tongue body of the alveolar stridents exhibit concave cross-sectional shapes while that of the postalveolars show a relatively raised tongue body with flat or slightly convex cross-sectional shapes. The concave tongue shapes of the alveolars result in a more abrupt area function behind the constriction when compared to that of the postalveolars. Laminality or apicality of articulation is found to be speaker dependent. Moreover, a greater degree of anterior medial grooving and lateral lingua-palatal contact is found in apical alveolar fricatives than in laminal ones. The posterior tongue body of all fricatives shows concave cross-sectional shapes. Voiced fricatives are characterized by larger pharyngeal volumes than the unvoiced fricatives due to tongue-root advancement. Tongue-shape asymmetries are found to be subject and, in some cases, sound dependent. (C) 1995 Acoustical Society of America.
    The Journal of the Acoustical Society of America 09/1995; 98(3-3):1325-1347. DOI:10.1121/1.413469 · 1.50 Impact Factor
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    ABSTRACT: Covarying acoustic pattern features located near the boundary region between a frication noise segment and the adjacent vocoid (vocalic) segments seem likely to be important for the intelligibility of fricative consonants. Attempts to capture some of these naturally occurring effects through simulation with a computer-implemented composite model of speech production are described. The aim is to gain greater understanding of the production of fricatives by trying to match quantitatively the detailed patterning for each of 2 speakers. These acoustic patterns may be useful to listeners. A model that can capture crucial portions of vocal tract, larynx, and respiratory actions and can generate similar acoustic effects should help with the derivation of rules to describe the complex patterning of natural speech. (PsycINFO Database Record (c) 2012 APA, all rights reserved)
    Journal of Phonetics 12/1991; · 1.41 Impact Factor
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    ABSTRACT: A speech synthesis technique is described which incorporates acoustic models for sound propagation in a tube with yielding walls, turbulent noise generation at locations of constricted volume flow in the vocal tract, and the self-oscillatory properties of the vocal cord source. This formulation frees the experimenter from a traditional limitation, namely, the assumption of linear separability of sound source and resonant system. As a consequence, new opportunities accrue for building realistic physiological characteristics into the synthesizer. These built-in characteristics represent information that need not be overtly supplied to control the synthesizer. The system is used to synthesize test syllables from controls which are stylized models of articulation and connected speech from controls automatically derived from printed text. The synthesis technique demonstrates the feasibility of generating all speech sounds (voiced, unvoiced, nasal) from a common set of physiologically based control parameters, as the human does.
    IEEE Transactions on Acoustics Speech and Signal Processing 05/1976; 24(2-24):163 - 170. DOI:10.1109/TASSP.1976.1162778
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