Stationary noise responses in a nonlinear model of cochlear mechanics: iterative solutions in the frequency domain.
Stationary noise responses in a nonlinear model of cochlear mechanics: iterative solutions in the frequency domain.
复制标题
耳蜗力学非线性模型中的稳态噪声响应：频域中的迭代解。
DOI：
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发表时间：
2014
影响因子：
2.4
通讯作者：
Yi
中科院分区：
文献类型：
--
作者：
Yi
为了检验耳蜗力学中的拟线性滤波特性，Liu和Neely[2012]。我的耳朵里有什么火：听觉生物力学的进展，由C. a . Shera和E. S. Olson （AIP, Melville， NY）编辑，第218-223页)计算非线性耳蜗模型的维纳核；结果表明，将模型核视为等效线性系统的脉冲响应，可以准确地预测模型对噪声的响应。然而，之前的工作并没有表明准线性滤波器可以在模型的相同结构下实现，这是de Boer[(1997)]预测的性质。澳元。[j].中国生物医学工程。为了解决可实现性问题，本文提出了一种在频域迭代计算耳蜗模型对噪声响应的方法。首先，计算耳蜗传递函数，如果系统是线性的；然后，调整外毛细胞机电转导的效率。这两个步骤重复，直到传递函数收敛。仿真结果表明，随着刺激水平的增加，耳蜗的幅度反应减小，潜伏期缩短。相应的脉冲响应近似等于时域仿真得到的维纳核；随着刺激的变化，以能量表示的近似误差<5%。因此，采用该方法可以有效地计算维纳核，并保证了模型的结构不变。
To examine quasilinear filtering properties in cochlear mechanics, Liu and Neely [(2012). What Fire is in Mine Ears: Progress in Auditory Biomechanics, edited by C. A. Shera and E. S. Olson (AIP, Melville, NY), pp. 218-223] calculated Wiener kernels of a nonlinear cochlear model; it was verified that the model's responses to noise could be accurately predicted by treating the kernels as the impulse responses of an equivalent linear system. However, this previous work fell short of showing that the quasilinear filters could be realized under the same structure of the model, a property predicted by de Boer [(1997). Aud. Neurosci. 3, 377-388]. To address the issue of realizability, this paper presents a method that computes the cochlear model's responses to noise iteratively in the frequency domain. First, cochlear transfer functions are calculated as if the system is linear; then, the efficiency of the outer hair cell electromechanical transduction is adjusted. The two steps repeat until the transfer functions converge. Simulation shows that, as the stimulus level increases, the magnitude response of the cochlea decreases and the latency shortens. The corresponding impulse responses are approximately equal to the Wiener kernels obtained in time-domain simulation; as the stimulus varies, the approximation error is <5% in terms of energy. Thus, the Wiener kernels are effectively computed via the present method, which guarantees that the structure of the model is preserved.
影响因子：
2.4
作者：
Ruggero, MA;Rich, NC;Robles, L
通讯作者：
Robles, L
影响因子：
2.4
作者：
Puria, S
通讯作者：
Puria, S