Browsing by Person "Geng, Christian"

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The Control of Token-to-Token Variability: an Experimental and Modeling Study.
(2001) Mooshammer, Christine; Perrier, Pascal; Fuchs, Susanne; Geng, Christian; Payan, Yohan
The articulatory token-to-token variability in the production of German vowels is investigated with simultaneous EMMA and EPG recordings. The potential role of physical constraints, such as the contacts between tongue and palate measured by EPG, and the biomechanical properties of the tongue, simulated with a 2D finite element model is evaluated. Our results suggest that the control of high front vowels makes use of the palatal contacts, while the variability of low vowels is essentially oriented along the main axis of deformation of the tongue, the high/front-to-low/back direction.
The Edinburgh Speech Production Facility DoubleTalk Corpus
(International Speech Communication Association, 2013-08-25) Scobbie, James M.; Turk, Alice; Geng, Christian; King, Simon; Lickley, Robin; Richmond, Korin
The DoubleTalk articulatory corpus was collected at the Edinburgh Speech Production Facility (ESPF) using two synchronized Carstens AG500 electromagnetic articulometers. The first release of the corpus comprises orthographic transcriptions aligned at phrasal level to EMA and audio data for each of 6 mixed-dialect speaker pairs. It is available from the ESPF online archive. A variety of tasks were used to elicit a wide range of speech styles, including monologue (a modified Comma Gets a Cure and spontaneous story-telling), structured spontaneous dialogue (Map Task and Diapix), a wordlist task, a memory-recall task, and a shadowing task. In this session we will demo the corpus with various examples.
WHAT ROLE DOES THE PALATE PLAY IN SPEECH MOTOR CONTROL? INSIGHTS FROM TONGUE KINEMATICS FOR GERMAN ALVEOLAR OBSTRUENTS
(2003) Fuchs, Suzanne; Perrier, Pascal; Geng, Christian; Mooshammer, Christine
ABSTRACT: The tongue moves in a narrow space which influences the speech planning process and affects the kinematic properties of the movement. In order to study the possible role of tongue-palate interaction we investigated tongue tip movement together with tonguepalatal contact patterns by means of simultaneous EMA and EPG recordings. Articulatory data for four German speakers were analyzed. Speech material consisted of VC and VC@ sequences with C being /t/ or /s/ and V being stressed tense /a/ or /u/. The relation between the kinematics of the tongue tip closing gesture and changes in tongue-palatal contact patterns in the anterior, posterior and lateral region were studied. Results for /t/ show a large movement amplitude and a short closing gesture duration whereas in /s/ production the movement amplitude is smaller and the duration longer than in /t/. We conclude that in /t/ the tongue tip hits the palate and this impact stops the movement. In /s/ production we suppose that a precise positioning of the tongue tip is achieved. Speaker dependent tongue-palatal contact patterns can be explained in terms of differences in the palatal shape.