Measurements of three-dimensional shape and sound-induced motion of the chinchilla tympanic membrane.
Measurements of three-dimensional shape and sound-induced motion of the chinchilla tympanic membrane.
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DOI：
10.1016/j.heares.2012.11.022
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发表时间：
2013-07
期刊：
影响因子：
2.8
通讯作者：
Furlong, Cosme
中科院分区：
文献类型：
--
作者：
Rosowski, John J.;Dobrev, Ivo;Khaleghi, Morteza;Lu, Weina;Cheng, Jeffrey Tao;Harrington, Ellery;Furlong, Cosme
用光电计算机全息术测量了灰鼠尸体鼓膜的厚度。使用两种激光波长的测量来计算TM的3D形状。单激光波长测量锁定到八个不同的相位的音调刺激被用来确定的幅度和相对相位的表面位移。这些测量是在TM表面上超过250，000个点上进行的。所测得的运动包含空间相位变化与相对低阶（大空间频率）的模态运动和较小幅度的高阶（较小的空间频率）的运动，似乎旅行，但也可以解释膜内的损失。形状的测量和薄壳理论允许我们将所测量的运动分离成正交于鼓膜环平面的那些分量，以及基于3D形状的鼓膜环平面内的那些分量。预测的平面内运动分量通常小于运动的平面外垂直分量。由于平面内和平面外的推导主要取决于膜形状，因此预测的运动分量的相对大小不随频率而变化。
Opto-electronic computer holographic measurements were made of the tympanic membrane (TM) in cadaveric chinchillas. Measurements with two laser wavelengths were used to compute the 3D-shape of the TM. Single laser wavelength measurements locked to eight distinct phases of a tonal stimulus were used to determine the magnitude and the relative phase of the surface displacements. These measurements were made at over 250,000 points on the TM surface. The measured motions contained spatial phase variations consistent with relatively low-order (large spatial frequency) modal motions and smaller magnitude higher-order (smaller spatial frequency) motions that appear to travel, but may also be explained by losses within the membrane. The measurement of shape and thin shell theory allowed us to separate the measured motions into those components orthogonal to the plane of the tympanic ring, and those components within the plane of the tympanic ring based on the 3D-shape. The predicted in-plane motion components are generally smaller than the out-of-plane perpendicular component of motion. Since the derivation of in-plane and out-of plane depended primarily on the membrane shape, the relative sizes of the predicted motion components did not vary with frequency.
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影响因子：
2.8
作者：
de La Rochefoucauld, Ombeline;Olson, Elizabeth S.
通讯作者：
Olson, Elizabeth S.
影响因子：
2.4
作者：
FUNNELL, WRJ;DECRAEMER, WF;KHANNA, SM
通讯作者：
KHANNA, SM
影响因子：
2.4
作者：
RABBITT, RD;HOLMES, MH
通讯作者：
HOLMES, MH
影响因子：
2.1
作者：
Gan, RZ;Sun, QL;Dormer, KJ
通讯作者：
Dormer, KJ
影响因子：
2.4
作者：
Fay, J;Puria, S;Steele, C
通讯作者：
Steele, C