Sökning: "glottal area"

Hittade 4 avhandlingar innehållade orden glottal area.

  1. 1. Methods for measurement of vocal fold vibration and viscoelasticity

    Författare :Hans Larsson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :High-speed video imaging; kymography; acoustic analysis; vocal fold vibration; glottal edge; glottal area; laser; mucosal wave; triangulation; vocal fold; vocal fold length; vocal fold width; vocal fold strain; non-invasive; vocal fold scarring; air pulse stimulation;

    Sammanfattning : The overall aim of the thesis was to develop new methods for analysis of vocal fold vibrations and viscoelasticity and to test them in human subjects. In Study I the onset of vibration and irregular vocal fold vibration was examined with laryngoscopy using a high-speed camera at a frame rate of about 2000 images/sec. LÄS MER

  3. 2. Analyses of voice and glottographic signals in singing and speech

    Författare :Andreas Selamtzis; Sten Ternström; Paavo Alku; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; voice ; singing ; electroglottography ; clustering ; dysphonia ; sample entropy ; ; Tal- och musikkommunikation; Speech and Music Communication;

    Sammanfattning : Recent advances in machine learning and time series analysis techniques have brought new perspectives to a great number of scientific fields. This thesis contributes applications of such techniques to voice analysis, in an attempt to extract information on the vibration of the vocal folds as such, as well as on the radiated acoustic signal. LÄS MER

  4. 3. Speech and language in patients with an isolated cleft palate and/or 22q11 deletion syndrome

    Författare :Christina Persson; Göteborgs universitet; []
    Nyckelord :isolated cleft palate; 22q11 deletion syndrome; articulation; language; velopharyngeal impairment; intelligibility.;

    Sammanfattning : Aims: To study speech with regard to articulation and perceptual speech symptoms related to velopharyngeal dysfunction, intelligibility and language ability in patients born with a) an isolated cleft palate with or without additional malformations/syndromes, or b) 22q11 deletion syndrome (22q11 DS).Materials and methods: Fifty-three patients (aged 3-10 years) born with an isolated cleft palate and 30 non-cleft children participated in studies I and II, and 65 consecutively referred patients with 22q11 DS confirmed by a FISH-test participated in studies III and IV. LÄS MER

  5. 4. Computer methods for voice analysis

    Författare :Svante Granqvist; KTH; []
    Nyckelord :voice analysis; perceptual analysis; fundamental frequency; correlogram; aperiodicity; Fourier analysis; high-speed imaging; laryngoscopy; vocal fold vibration; voice accumulation.; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : This thesis consists of five articles and a summary. Thethesis deals with methods for measuring properties of thevoice. The methods are all computer-based, but utilisedifferent approaches for measuring different aspects of thevoice. Paper I introduces the Visual Sort and Rate (VSR) method forperceptual rating of voice quality. LÄS MER