Measurement of the vocal-fold vibration behaviour in excised human larynges
نویسندگان
چکیده
The contribution presents information on the experimental investigation of the glottal sound source with excised human larynges. The vocal fold vibrations were excited by airflow and monitored acoustically, electroglottographically as well as by means of laser vibrometry, pressure transducers, videokymography and stroboscopy techniques. The paper is focused on 1) presenting a method for monitoring non-linear vibration effects, when bifurcations appear during phonation by changing the tension of the vocal folds, and 2) on development of a method for casting laryngeal cavities using plaster and metal materials for determining the vocal fold shape in a defined phonation position.
منابع مشابه
A separate detection of the vibration of each vocal fold by a new opto-electronic device
The existence of low-frequency modulations in some pathological vocal signals has already been reported by several authors. We have focused on the existence of these non-linear phenomena analysing the vibration of excised animal larynges submitted to asymmetrical situations. This work presents a laser beam device permitting to detect the vibration of each fold both simultaneously and separately...
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We used B-mode imaging to study the vibratory phenomena of the vocal folds. The presence of multilayered structures of the vocal folds in the B-mode image was verified by using freshly excised human larynges in vitro. To capture images of vocal fold vibration, a special treatment was used to reconstruct the aliasing B-mode motion pictures of vocal fold vibration. Echo-particle image velocimetry...
متن کاملIn vivo vocal fold cover layer replacement.
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متن کاملModulating phonation through alteration of vocal fold medial surface contour.
OBJECTIVES/HYPOTHESIS 1) To test whether alteration of the vocal fold medial surface contour can improve phonation and 2) to demonstrate that implant material properties affect vibration even when implantation is deep to the vocal fold lamina propria. STUDY DESIGN Induced phonation of excised human larynges. METHODS Thirteen larynges were harvested within 24 hours postmortem. Phonation thre...
متن کاملEffects of length and depth of vibration of the vocal folds on the relationship between transglottal pressure and fundamental frequency of phonation in canine larynges.
The relationship between fundamental frequency of phonation (F0) and the change in F0 per unit change of transglottal pressure (dF/dP) was investigated in 3 excised canine larynges. The effects of the length and depth of vocal fold vibration on the relationship between dF/dP and F0 were evaluated. A positive correlation between dF/dP and F0 was observed when an increase in F0 was accompanied by...
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تاریخ انتشار 2001