Bifurcations in excised larynx experiments
Bifurcations in excised larynx experiments
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DOI：
10.1016/s0892-1997(96)80039-7
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发表时间：
1996-06-01
期刊：
影响因子：
2.2
通讯作者：
Story, BH
中科院分区：
文献类型：
--
作者：
Berry, DA;Herzel, H;Story, BH
应用分叉分析方法对离体喉实验中的声带振动进行了研究。在声门下压和声带内收或伸长的不对称性所跨越的参数平面上研究发声起始和发声不稳定性。各种发声制度进行了观察，包括单声带振荡。选定的光谱表现出这些制度和声乐寄存器在文献中指出的对应关系。为了说明所跨越的区域的各种发声制度，二维分叉图生成。在共存区域中注意到许多不稳定性或分叉，即，发音机制重叠的区域。用频谱图和基频等值线图说明了分叉。如可能，这些研究的结果与临床观察结果相关。
Bifurcation analysis was applied to vocal fold vibration in excised larynx experiments. Phonation onset and vocal instabilities were studied in a parameter plane spanned by subglottal pressure and asymmetry of either vocal fold adduction or elongation. Various phonatory regimes were observed, including single vocal fold oscillations. Selected spectra demonstrated correspondence between these regimes and vocal registers noted in the literature. To illustrate the regions spanned by the various phonatory regimes, two-dimensional bifurcation diagrams were generated. Many instabilities or bifurcations were noted in the regions of coexistence, i.e., regions in which the phonatory regimes overlap. Bifurcations were illustrated with spectrograms and fundamental frequency contours. Where possible, results from these studies were related to clinical observations.