Lim Kian-Meng, Steele Charles R
Department of Mechanical Engineering, National University of Singapore, 10 Kent Ridge Crescent, 119260, Singapore.
Hear Res. 2002 Aug;170(1-2):190-205. doi: 10.1016/s0378-5955(02)00491-4.
A physiologically based nonlinear active cochlear model is presented. The model includes the three-dimensional viscous fluid effects, an orthotropic cochlear partition with dimensional and material property variation along its length, and a nonlinear active feed-forward mechanism of the organ of Corti. A hybrid asymptotic and numerical method combined with Fourier series expansions is used to provide a fast and efficient iterative procedure for modeling and simulation of the nonlinear responses in the active cochlea. The simulation results for the chinchilla cochlea compare very well with experimental measurements, capturing several nonlinear features observed in basilar membrane responses. These include compression of response with stimulus level, two-tone suppressions, and generation of harmonic distortion and distortion products.
提出了一种基于生理学的非线性有源耳蜗模型。该模型包括三维粘性流体效应、一个沿其长度方向尺寸和材料特性变化的正交各向异性耳蜗隔板，以及柯蒂氏器的非线性有源前馈机制。一种结合傅里叶级数展开的混合渐近和数值方法被用于为有源耳蜗中的非线性响应建模和仿真提供快速有效的迭代过程。针对灰鼠耳蜗的仿真结果与实验测量结果非常吻合，捕捉到了在基底膜响应中观察到的几个非线性特征。这些特征包括响应随刺激强度的压缩、双音抑制以及谐波失真和失真产物的产生。
