Are active elements necessary in the basilar membrane impedance?
Are active elements necessary in the basilar membrane impedance?
复制标题
基底膜阻抗中是否需要活性元素？
DOI：
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发表时间：
1986
影响因子：
2.4
通讯作者：
E. de Boer
中科院分区：
文献类型：
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作者：
R. J. Diependaal;M. Viergever;E. de Boer
这篇文章的动机是当前的假设[Kim等人，听力的心理、生理和行为研究（德尔夫特U。P.，The Netherlands，1980）; Neely，Doctoral dissertation，华盛顿大学，圣路易斯，密苏里州（1981）; de Boer，J. Acoust.美国社会73，567-573（1983 a）和73，574-576（1983 b）]，有必要在基底膜（BM）阻抗中包括有源元件，以便解释最近关于BM振动的数据[卡纳和伦纳德，科学215，305-306（1982）; Sellick等人，J. Acoust.美国社会72，131-141（1982）; Robles等人，Peripheral Auditory Mechanisms（Springer，纽约，1986）]。为了检验这一假设，首先，描述了一种方法，该方法是耳蜗力学的习惯描述的反转。而不是计算BM速度为一个给定的点阻抗的膜，我们展示了如何计算阻抗函数从一个给定的BM速度模式在镫骨的正弦输入响应。然后，这种方法被用来研究恢复的阻抗的速度模式中的扰动的灵敏度。所使用的模拟表明，阻抗的真实的部分对这种扰动极其敏感。因此，测量的速度模式不太可能解决是否应包括有源元件的问题。在膜上的几个点处测量的频率响应更不可能这样做。
This article is motivated by the current hypothesis [Kim et al., Psychological, Physiological and Behavioural Studies in Hearing (Delft U. P., The Netherlands, 1980); Neely, Doctoral dissertation, Washington University, St. Louis, MO (1981); de Boer, J. Acoust. Soc. Am. 73, 567-573 (1983a) and 73, 574-576 (1983b)] that it is necessary to include active elements in the basilar membrane (BM) impedance in order to explain recent data on the vibration of the BM [Khanna and Leonard, Science 215, 305-306 (1982); Sellick et al., J. Acoust. Soc. Am. 72, 131-141 (1982); Robles et al., Peripheral Auditory Mechanisms (Springer, New York, 1986)]. In order to test this hypothesis, first, a method which is an inversion of the customary description of cochlear mechanics is described. Instead of computing the BM velocity for a given point impedance of the membrane, we show how to compute the impedance function from a given BM velocity pattern in response to a sinusoidal input at the stapes. This method is then used to study the sensitivity of the recovered impedance to perturbations in the velocity pattern. The simulations used show that the real part of the impedance is extremely sensitive to such perturbations. Therefore, measured velocity patterns are unlikely to resolve the issue of whether active elements should be included. Frequency responses measured at a few points on the membrane are even less likely to do so.