Vibration parameter extraction from endoscopic image series of the vocal folds
Vibration parameter extraction from endoscopic image series of the vocal folds
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DOI：
10.1109/tbme.2002.800755
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发表时间：
2002-08-01
影响因子：
4.6
通讯作者：
Eysholdt, U
中科院分区：
文献类型：
--
作者：
Döllinger, M;Hoppe, U;Eysholdt, U
提出了一种基于声带振动的数字高速记录和生物力学模型提取影响发声参数的方法。影响振动的主要参数是振动质量、声带张力和声门下气压。通过将数字高速观测与由Ishizaka和Flanagan（1972）提出并经Steinecke和Herzel（1995）修正的双质量模型相结合，发展了一种反演方法，可以识别和量化喉状不对称。该问题被视为一个非凸目标函数的优化过程。对于这类问题，选择合适的初值是很重要的。这种优化过程是基于声带运动的频谱特征。反演过程的适用性首先证明在模拟声带曲线。然后，反演结果提出了一个健康的声音和嘶哑的声音的情况下，功能性发声障碍引起的喉不对称。
An approach is given to extract parameters affecting phonation based upon digital high-speed recordings of vocal fold vibrations and a biomechanical model. The main parameters which affect oscillation are vibrating masses, vocal fold tension, and subglottal air pressure. By combining digital high-speed observations with the two-mass-model by Ishizaka and Flanagan (1972) as modified by Steinecke and Herzel (1995), an inversion procedure has been developed which allows the identification and quantization of laryngeal asymmetries. The problem is regarded as an optimization procedure with a nonconvex objective function. For this kind of problem, the choice of appropriate initial values is important. This optimization procedure is based on spectral features of vocal fold movements. The applicability of the inversion procedure is first demonstrated in simulated vocal fold curves. Then, inversion results are presented for a healthy voice and a hoarse voice as a case of functional dysphonia caused by laryngeal asymmetry.