The energy dissipated during vocal fold (VF) contact is a predictor of phonotrauma. Difficulty measuring contact pressure has forced prior energy dissipation estimates to rely upon generalized approximations of the contact dynamics. To address this shortcoming, contact pressure was measured in a self-oscillating synthetic VF model with high spatiotemporal resolution using a hemilaryngeal configuration. The approach yields a temporal resolution of less than 0.26 ms and a spatial resolution of 0.254 mm in the inferior-superior direction. The average contact pressure was found to be 32% of the peak contact pressure, 60% higher than the ratio estimated in prior studies. It was found that 52% of the total power was dissipated due to collision. The power dissipated during contact was an order of magnitude higher than the power dissipated due to internal friction during the non-contact phase of oscillation. Both the contact pressure magnitude and dissipated power were found to be maximums at the mid anterior-posterior position, supporting the idea that collision is responsible for the formation of benign lesions, which normally appear at the middle third of the VF.

中文翻译：

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合成自振荡模型中的声带动力学：接触压力和耗散能量剂量

声带 (VF) 接触过程中耗散的能量是音伤的预测指标。测量接触压力的困难迫使先前的能量耗散估计依赖于接触动力学的广义近似。为了解决这个缺点，使用半喉配置在具有高时空分辨率的自振荡合成 VF 模型中测量接触压力。该方法在上下方向上产生小于 0.26 ms 的时间分辨率和 0.254 mm 的空间分辨率。发现平均接触压力是峰值接触压力的 32%，比先前研究中估计的比率高 60%。结果发现，52%的总功率因碰撞而耗散。接触期间消耗的功率比振荡的非接触阶段由于内部摩擦而消耗的功率高一个数量级。发现接触压力大小和耗散功率在前后中间位置均达到最大值，这支持了碰撞导致良性病变形成的观点，良性病变通常出现在 VF 的中间三分之一处。