Coherent structures of the near field flow in a self-oscillating physical model of the vocal folds
Coherent structures of the near field flow in a self-oscillating physical model of the vocal folds
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DOI：
10.1121/1.2409488
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发表时间：
2007-02-01
影响因子：
2.4
通讯作者：
Berry, David A.
中科院分区：
文献类型：
--
作者：
Neubauer, Jurgen;Zhang, Zhaoyan;Berry, David A.
目前的发声理论主要依赖于从声门发出的近场流的知识。虽然大多数现代理论预测复杂的，三维结构的近场流，很少有调查试图量化这样的结构。使用流动可视化和数字粒子图像测速的方法，这项研究测量了近场流动结构的自振荡，物理模型的声带，附声道的下游。使用经验正交本征函数的方法进行时空分析的结构。一些观察到的流动结构，包括涡流产生，涡流对流，和射流拍打。这些数据的效用在未来的发展更准确，低维模型的语音生产进行了讨论。(c)2007年，美国声学学会。
Current theories of voice production depend critically upon knowledge of the near field flow which emanates from the glottis. While most modern theories predict complex, three-dimensional structures in the near field flow, few investigations have attempted to quantify such structures. Using methods of flow visualization and digital particle image velocimetry, this study measured the near field flow structures immediately downstream of a self-oscillating, physical model of the vocal folds, with a vocal tract attached. A spatio-temporal analysis of the structures was performed using the method of empirical orthogonal eigenfunctions. Some of the observed flow structures included vortex generation, vortex convection, and jet flapping. The utility of such data in the future development of more accurate, low-dimensional models of voice production is discussed. (c) 2007 Acoustical Society of America.