Division of Phoniatrics-Logopedics, Department of Otorhinolaryngology, Medical University of Vienna, Austria.
Department of Biomedical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Chennai, India.
J Speech Lang Hear Res. 2022 Jul 18;65(7):2431-2445. doi: 10.1044/2022_JSLHR-21-00673. Epub 2022 Jun 30.
Laryngeal high-speed videoendoscopy (LHSV) has been recognized as a highly valuable modality for the scientific investigations of vocal fold (VF) vibrations. In contrast to stroboscopic imaging, LHSV enables visualizing aperiodic VF vibrations. However, the technique is less well established in the clinical care of disordered voices, partly because the properties of aperiodic vibration patterns are not yet described comprehensively. To address this, a computer model for simulation of VF vibration patterns observed in a variety of different phonation types is proposed.
A previously published kinematic model of mucosal wave phenomena is generalized to be capable of left-right asymmetry and to simulate endoscopic videos instead of only kymograms of VF vibrations at single sagittal positions. The most influential control parameters are the glottal halfwidths, the oscillation frequencies, the amplitudes, and the phase delays.
The presented videos demonstrate zipper-like vibration, pressed voice, voice onset, constant and time-varying left-right and anterior-posterior phase differences, as well as left-right frequency differences of the VF vibration. Video frames, videokymograms, phonovibrograms, glottal area waveforms, and waveforms of VF contact area relating to electroglottograms are shown, as well as selected kinematic parameters.
The presented videos demonstrate the ability to produce vibration patterns that are similar to those typically seen in endoscopic videos obtained from vocally healthy and dysphonic speakers.
喉高速视频内镜（LHSV）已被公认为是研究声带（VF）振动的一种非常有价值的方法。与频闪成像相比，LHSV 能够可视化非周期性 VF 振动。然而，该技术在紊乱性嗓音的临床护理中应用较少，部分原因是尚未全面描述非周期性振动模式的特性。为了解决这个问题，提出了一种用于模拟各种不同发声类型中观察到的 VF 振动模式的计算机模型。
对先前发表的黏膜波现象运动学模型进行了推广，使其能够实现左右不对称，并能够模拟内窥镜视频，而不仅仅是单个矢状位置的 VF 振动的振子图。最具影响力的控制参数是声门的半宽度、振荡频率、幅度和相位延迟。
所呈现的视频演示了拉链样振动、压声、发声起始、恒定和时变的左右和前后相位差，以及 VF 振动的左右频率差异。展示了视频帧、视频振子图、声振图、声门区波、与电声图相关的 VF 接触区波，以及选定的运动学参数。
所呈现的视频演示了产生类似于从发声正常和发声障碍的说话者获得的内窥镜视频中常见的振动模式的能力。
