Analysis of Human Vocal Fold Vibrations by Means of Measurement of Flow Velocity Variations Just Above the Glottis and Simultaneous Observation of Vocal Fold Movement Using High-Speed Digital Camera

A Study of Simultaneous Measurement of Vocal Fold Vibrations and Flow Velocity Variations Just above the Glottis

Human voices are originated by vibration of vocal folds in the larynx. Vocal folds are mainly composed of internal (muscle) bands and mucous tissue. It is considered that this tissue vibrates responding to breath airflow from the lungs and the resulting oscillation makes the origin of vocal sound, i.e., phonation. The vocal fold tissue is relatively flexible and an easily deformable substance. ...

Quantitative analysis of diplophonic vocal fold vibratary pattern from high-speed digital imaging of glottis

Modal analysis of vocal fold vibrations using laryngotopography

In this paper, we propose a method for analyzing spatial characteristics of the larynx during phonation by high-speed digital imaging. The laryngotopography was applied to the high-speed digital images of normal subjects, and patients with paralysis and cyst. The results show various modes of vibration of the vocal folds particular to the patients with paralysis and cyst and usefulness of the l...

Vocal Fold and False Vocal Fold Vibrations in Throat Singing and Synthesis of Khöömei

We observed laryngeal movements in throat singing using physiological methods: the simultaneous recording of singing sounds, EGG, and high-speed digital images. We observed vocal fold and false vocal fold vibration and estimated the vibration patterns. We also estimated the laryngeal voices by using an inverse filtering method and simulated the vibration pattern using a new physical model: 2× 2...

High-speed Laryngeal Imaging Analysis of Vocal Fold Dynamics

High-speed laryngeal Imaging (HSLI) provides a direct means to observe the actual vibration of the vocal folds and allows for comprehensive analyses of vocal fold dynamics in normal and abnormal voice productions. Glottal edge detection is a key operation for tracing vibrations of the vocal folds at spatial locations and obtaining glottal area waveform (GAW) from the HSLI data. We have develope...