ACOUSTIC EFFECTS OF THE LARYNGEAL SUPRAGLOTTIC STRUCTURES

摘要

The acoustic effects of the supraglottic (SG) structure were investigated through the FFT spectrum analysis of the generated sounds of the excised canine larynx model with and wit hout false vocal folds (FVF). Oscillation was generated by controlling the flow of air through the glottis. The SG structure was kept intact in the first part of the experiment and removed in the second part. Results indicated that when the FVF vibrated, a low frequency component was observed in the spectral data. Also, a comparison between the audio spectra of the larynx with and without FVF suggests that the contribution of supraglottic structure to spectral information and consequently to the voice quality may be significant.