Hsiao Tzu-Yu, Wang Chung-Li, Chen Chiung-Nien, Hsieh Fon-Jou, Shau Yio-Wha
Department of Otolaryngology, National Taiwan University Hospital, Taipei, Taiwan.
Ultrasound Med Biol. 2002 Sep;28(9):1145-52. doi: 10.1016/s0301-5629(02)00559-8.
Noninvasive measurement of human vocal fold (VF) vibratory length was made during normal phonation to calculate the corresponding elasticity. A fixed-ends rubber string phantom that was driven by a vibrating motor was built to simulate the horizontal VF movement. The vibratory artefact of color Doppler imaging (CDI) was used to characterize and quantify the high-frequency tissue vibration with small amplitude. Because the frequency and the length of vibrating VFs were obtained simultaneously, the stress-strain relation and the Young's moduli of the VFs could be calculated. For the six vocally normal adult volunteers (3 M, 3 F, ages from 19 to 51 years old), the effective vibrating lengths of the vocal fold in low pitch were about 1.4 to 1.6 cm and 1.3 to 1.5 cm for men and women, respectively. The VFs lengths extended to about 1.7 to 1.8 cm in pitch over an octave higher and the stress-strain relation was nonlinear. However, in the range of lower pitch, the VF stress was relatively linear with respect to the strains and the Young's moduli were about 30 to 120 kPa in men and 120 to 300 kPa in women.
在正常发声过程中对人类声带（VF）的振动长度进行无创测量，以计算相应的弹性。构建了一个由振动电机驱动的固定端橡皮筋模型，以模拟声带的水平运动。利用彩色多普勒成像（CDI）的振动伪像来表征和量化小振幅的高频组织振动。由于同时获得了振动声带的频率和长度，因此可以计算声带的应力-应变关系和杨氏模量。对于6名发声正常的成年志愿者（3名男性，3名女性，年龄在19至51岁之间），男性和女性在低音调时声带的有效振动长度分别约为1.4至1.6厘米和1.3至1.5厘米。在高出一个八度的音调中，声带长度延伸至约1.7至1.8厘米，且应力-应变关系是非线性的。然而，在低音调范围内，声带应力相对于应变呈相对线性关系，男性的杨氏模量约为30至120千帕，女性为120至300千帕。
