Sökning: "vocal fold vibration"

Hittade 5 avhandlingar innehållade orden vocal fold vibration.

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

    Detta är en avhandling från Stockholm : Karolinska Institutet, Department of Clinical Sciences

    Författare :Hans Larsson; Karolinska Institutet.; Karolinska Institutet.; [2009]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; 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

  2. 2. Electroglottographic analysis of phonatory dynamics and states

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Andreas Selamtzis; KTH.; [2014]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; voice function; phonation; vocal fold vibration; vocal registers; electroglottography;

    Sammanfattning : The human voice is a product of an intricate biophysical system. The complexity of this system enables a rich variety of possible sounds, but at the same time poses great challenges for quantitative voice analysis. For example, the vocal folds can vibrate in several different ways, leading to variations in the acoustic output. LÄS MER

  3. 3. Computer methods for voice analysis

    Detta är en avhandling från Stockholm : KTH

    Författare :Svante Granqvist; KTH.; [2003]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; 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

  4. 4. Aerodynamic measurements of normal voice

    Detta är en avhandling från Stockholm : Department of Linguistics, University of Stockholm

    Författare :Eva Holmberg; Stockholms universitet.; [1993]
    Nyckelord :HUMANIORA; HUMANITIES; Normal voice; inverse filtering; glottal airflow waveform; subglottal air pressure; HUMANITIES and RELIGION Languages and linguistics Linguistic subjects Phonetics; HUMANIORA och RELIGIONSVETENSKAP Språkvetenskap Lingvistikämnen Fonetik; Phonetics; fonetik;

    Sammanfattning : Vocal fold vibration results from an alternating balance between subglottal air pressure that drives the vocal folds apart and muscular, elastic, and restoring forces that draw them together. The aim of the present thesis is to present quantitative data of normal vocal function using a noninvasive method. LÄS MER

  5. 5. Sound Generation and Propagation in the Human Upper Airways

    Detta är en avhandling från KTH Royal Institute of Technology

    Författare :Lukas Schickhofer; KTH.; [2017]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk mekanik; Engineering Mechanics;

    Sammanfattning : The human upper airways embrace the source of phonation and affect the modulation of the voice, which is of vital importance for communication. Moreover, unwanted sounds may be generated in the upper airways due to elastic, collapsible parts that are susceptible to flow-induced vibration and resonance. LÄS MER