High-speed digital imaging of the medial surface of the vocal folds
High-speed digital imaging of the medial surface of the vocal folds
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DOI：
10.1121/1.1408947
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发表时间：
2001-11-01
影响因子：
2.4
通讯作者：
Tayama, N
中科院分区：
文献类型：
--
作者：
Berry, DA;Montequin, DW;Tayama, N
在离体犬喉实验中，对声带内侧表面进行了高速数字成像。在Baer [Ph.D.论文，MIT，Boston，MA（1975）]和Jiang和Titze的半喉研究[Laryngoscope，103，872-882（1993）]中，使用KodakEktaPro 4540高速数字成像系统沿左声带的一个冠状面的内侧表面沿着跟踪九个声带肉点。通过从两个不同的视图进行成像，以4.5 kHz的采样频率和约0.08 nm的空间分辨率进行fleshpoint轨迹的3D重建。从周期性胸部振动的典型例子中得出了定量结果。此外，这些数据被分解成经验特征函数，声带振动的积木，阐明了自持振荡的基本机制。以前，这种机制仅在理论上使用声带振动的计算机模型进行了探索[Berry等人，J. Acoust. Soc. Am. 95，3595-3604（1994）]。与理论研究类似，两个本征函数捕获了98%的数据方差。由于这项研究利用了高速技术，该方法也可用于检查复杂的非周期性振动。因此，这种技术允许在实验室中使用振动组织的直接观察来探索规则和不规则声带振动的机制。(C)2001年，美国声学学会。
High-speed digital imaging of the medial surface of the vocal folds was performed in excised canine larynx experiments. Building on the excised larynx investigations of Baer [Ph.D. dissertation, MIT, Boston, MA (1975)] and hemilarynx investigations of Jiang and Titze [Laryngoscope, 103, 872-882 (1993)], nine vocal fold fleshpoints were tracked simultaneously along the medial surface of one coronal plane of the left vocal fold using a Kodak EktaPro 4540 high-speed digital imaging system. By imaging from two distinct views, 3D reconstructions of fleshpoint trajectories were performed with a sampling frequency of 4.5 kHz and a spatial resolution of approximately 0.08 nim. Quantitative results were derived from a typical example of periodic chestlike vibrations. Furthermore, these data were decomposed into empirical eigenfunctions, the building blocks of vocal fold vibration, illuminating basic mechanisms of self-sustained oscillation. Previously, such mechanisms have only been explored theoretically using computer models of vocal fold vibration [Berry et al., J. Acoust. Soc. Am. 95, 3595-3604 (1994)]. Similar to the theoretical studies, two eigenfunctions captured 98% of the variance of the data. Because this investigation utilized high-speed technology, the methodology may also be used to examine complex, aperiodic vibrations. Thus, this technique allows mechanisms of regular and irregular vocal fold vibration to be explored using direct observations of vibrating tissues in the laboratory. (C) 2001 Acoustical Society of America.