*****  Vocal Folds Imaging and Dynamics  *****

 

Depth Kymography, 3D-imaging, and

numerical simulations of human vocal folds vibrations during phonation.

back to home screen   .

 

Keywords:

- experimental: human vocal folds, laryngoscope design, laser triangulation, high-speed camera, position-sensitive array detector, clinical measurements;

- numerical simulations: two-masses model with horizontal and vertical freedom of motion, iterative solutions of equations of motion, alternating with solution of flows-pressures model using electrical circuits analogue;

- comparisons : of measurements and simulations, as functions of time.

 

Publications:

Instrument,   Optics,    Simulations + Comparisons with measurements

See also PPT- file: Vocal Folds Dynamics PPT-file (in PDF) and "List of Publications" (from no. 315 ...).

VIDEO

See VIDEO of the Dynamics of the Vocal folds (incl. explanation)

DOWNLOAD:    

Download simulation program VocalFolds.zzz here  

(change *.zzz -> *.zip, then unzip, then change *.fff -> *.exe and run)

 

Human Vocal Folds:

1, 2: right/left (!) fold; 3: blood vessel; 4: open glottis

Depth-kymography:   laser line imaging using triangulation

Depth kymograph

Depth-kymography image of vocal folds surface

as a function of time

Numerical simulations:   Two-masses model with springs and dampers.

Comparison of measurements and simulations, at different times during vibrational cycle.     see movie: VFDyn-movie

 

EXAMPLES OF SCREENS: (All screens also have print and file output in table format (compatible with Excel-like programs)

 

↓Fig.1. Start screen

↓Fig.2. Input screen (for references see publications)

VF-menu2

VF-input

↓Fig.3. Running simulation (coordinates, pressures and flows)

↓Fig.4. Running simulation with sounds and movie panel shown.

VF-running1

VF-running2

↓Fig.5. Results: pivot plot: changes in parameters upon changes in 1 par.

↓Fig.6. As Fig.5, but  3D-plot (log.)

VF-res-pivot1

VF-res-pivot2

↓Fig.7. Results: Slope plot: relative mutual changes in parameters

 

VF-res-slope1