Ralf Winkler

Ralf Winkler
Amazon

Doctor of Philosophy

About

24
Publications
4,153
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
181
Citations
Additional affiliations
July 2017 - March 2021
Amazon
Position
  • Data Associate
July 2016 - June 2017
Technische Universität Berlin
Position
  • Research Associate
November 2013 - June 2016
Technische Universität Berlin
Position
  • Lecturer
Education
February 2004 - December 2008
Technische Universität Berlin
Field of study
  • speech communication
October 1996 - May 2002
Technische Universität Berlin
Field of study
  • speech communication (phonetics), computer science (machine learning & computer graphics)

Publications

Publications (24)
Article
Full-text available
Purpose: Mumbling as opposed to clear speech is a typical male characteristic in speech and can be the consequence of a small jaw opening. While behavioral reasons have often been offered to explain sex-specific differences with respect to clear speech, the purpose of this study is to investigate a potential anatomical reason for smaller jaw openin...
Book
Full-text available
Orofacial biomechanics has been shown to influence the time signals of speech production and to impose constraints with which the central nervous system has to contend in order to achieve the goals of speech production. After a short explanation of the concept of biomechanics and its link with the variables usually measured in phonetics, two modeli...
Conference Paper
Full-text available
This study offers a possible physiological explanation for the observation that male speakers have repeatedly being found to exhibit less clear speech than females. We investigate one correlate of clear speech: jaw opening. In two articulatory data sets (American English, German) the jaw angle is examined as a function of sex and, additionally for...
Conference Paper
Full-text available
Speakers of a given language vary with respect to their acoustics, articulation, and motor commands. This variation is driven by a variety of influences, such as emotional states, communicative interaction, and individual properties of the vocal tract. In this work we focus on the latter. First, we build speaker-specific biomechanical tongue models...
Conference Paper
Full-text available
In this work we have constructed biomechanical tongue models derived from MRI data in order to investigate the effects of differing locations of vocal tract bending on variability in motor command space and overall articulatory variability for vowel targets. Acoustic models predict negligible effects of the bend of the vocal tract if its length is...
Article
Full-text available
It has been often suggested that, similarly to skilled arm or limb movements in humans, the production of speech gestures could be based on an optimal planning in the central nervous system. This planning would use internal representations of the speech production apparatus to determine the motor command patterns allowing the achievement by the spe...
Chapter
Full-text available
Listeners are able to judge a speaker's age with reasonable accuracy based on listening to recorded speech samples. Different acoustic characteristics seem to be particularly affected by anatomical, physiological and psychological changes underlying the normal aging process. Age, however, is not the only factor affecting these parameters. Other spe...
Chapter
Full-text available
Kurzfassung: Unterschiedliche technische Hilfsmittel wurden entwickelt, um ge-hörlose und profund schwerhörige Kindern beim Erlernen der Lautsprache zu un-terstützen. Die Systeme sind in der Lage, selbstständig, ohne Eingriff eines Thera-peuten, den Erfolg einer Äußerung zu bewerten. Probleme bereitet dagegen allen Systemen die Erzeugung von Hinwei...
Book
Die meisten Menschen sind sich der Tatsache nicht bewusst, dass sie, während sie sprechen, neben dem Inhalt Ihrer Äußerung stets auch weitere Informationen bezüglich ihrer Person offenbaren. Neben Informationen z.B. zu ihrem Geschlecht, ihrer regionalen Herkunft oder auch ihrem emotionalen Zustand werden im Rahmen mündlicher Kommunikation immer auc...
Article
Full-text available
This study investigates the relation between para¬meters describing differences between speaker-speci¬fic vocal tract geometries and articulatory distances between the corner vowels based on MRI data of 9 French speakers. Results provide evidence that speaker with a longer pharynx produce larger displacements between low back and high front vowels....
Article
Full-text available
Listeners are able to rate a speaker's age with rea-sonable accuracy. Although several speech fea-tures are known to be characteristic for specific age groups, there is less knowledge about the perceptual relevance of those parameters. This paper describes the results of a perception study, where single word stimuli were synthesized and rated regar...
Article
Full-text available
We investigated alveolar-velar stop sequences in connected speech processes in order to understand the potential articulatory and aerodynamic causes for the alveolar weakening, often discussed with respect to assimilation. We will also shed light on the potential click-nature of these sequences as suggested in the literature. By means of a new expe...
Article
Full-text available
This paper presents the results of open quotient (OQ) measurements in electroglottographic (EGG) signals of young (18–30 years) and elderly (60–82 years) male and female speakers. The paper further presents quantitative results of the relation between the EGG OQ and the perception of a speaker's age.Higgins and Saxman found a decreased EGG OQ with...
Article
Full-text available
This study investigates the relations between different vocal tract shapes and articulatory control strategies in vowel production by means of experimental data from MRI and simulations with a model. We particularly focused on the pharynx. Nine French native speakers were recorded with MRI. We found that speakers with a wider pharynx always show a...
Article
Full-text available
This paper presents the results of Open Quotient measurements in EGG signals of young (18 to 30 year old) and elderly (59 to 82 year old) male and female speakers. The paper further presents quantitative results on the relation between the OQ and the perception of a speaker's age. Higgins & Saxman (1991) found a decreased OQEGG with increasing age...
Article
Full-text available
The articulatory data situation with respect to the palatal stop in Czech is dissatisfying: Static X-rays, linguo-and palatograms still seem to be state of the art. This study aims at the potential benefit of acoustic-articulatory recovery strategies in the deter-mination of place of articulation features. Results in-dicate recovery problems using...
Conference Paper
Full-text available
This study examines the differences between young and old adult voices. Acoustic cues in voices that enable listeners to recognize a speaker's vocal age are specified as well as acoustic cues that straightly indicate the speaker's chronological age. Electroglottographic data were used to directly examine glottal behaviour in aging voices. We found...
Conference Paper
Full-text available
Es kann angenommen werden, dass sich der emotionale Zustand eines Sprechers neben prosodischen und artikulatorischen auch in stimmqualitativen Pa-rametern manifestiert. Es stellt sich die Frage, ob die stimmqualitativen Parameter in elektroglottographischen Signalen zu finden sind bzw. sogar besonders hervor-treten. Die Datenbasis besteht aus vorge...
Conference Paper
Full-text available
In previous work the three-mode factor analysis technique PARAFAC had given a revealing picture of tongue configurations for vowels derived from both EMMA and mid-sagittal NMRI data. While very parsimonious and elegant, it appeared, however, that the PARAFAC model might be too restrictive to capture speaker-specific effects in consonantal (from EMM...
Article
Full-text available
A method has been developed for three-dimensional reconstruction of the vocal tract shape and for the calculation of area function from magnetic resonance imaging (MRI). MR images were acquired and analyzed for 6 German long vowels uttered by one subject. The resulting vocal tract area functions are the basis for the calculation of formant frequenc...

Network

Cited By

Projects

Projects (2)
Project
The SPRECHart (SPEECHart) - project aims at a deeper understanding of the often reported speaker-specific articulation and explains them with respect to individual vocal tract shapes.
Project
Finding acoustic properties of speech sounds that encode the speakers (chronological) age and/or the (perceptive) age-effect.