| 正弦激励下的非线性耳蜗模型:传输函数及频率响应 |
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| 引用本文： | 万旺根,樊昌信.正弦激励下的非线性耳蜗模型:传输函数及频率响应[J].西安电子科技大学学报,1992(4). |
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| 作者姓名： | 万旺根 樊昌信 |
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| 作者单位： | 西安电子科技大学信息工程系，西安电子科技大学信息工程系 |
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| 摘 要： | 对正弦激励下的二维非线性耳蜗模型,该文采用空间离散法使其在坐标 x 方向(基底膜长度方向)离散化,并在时域上求出了基底膜在给定激励(镫骨运动速度)下,各点稳态振动速度的解析解.以基底膜稳态振动速度为输出、镫骨运动速度为输入,定义了非线性耳蜗模型的传输函数,并由此求出了耳蜗模型的频率响应。计算结果表明,耳蜗流体的粘滞性及非线性运动特性是影响实际耳蜗频率特性上升斜率的两个主要因素。
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| 关 键 词： | 粘滞性 非线性 耳蜗模型 频率响应 |
Sinusoid excited nonlinear cochlear model:transfer functions and frequency responses |
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| Wan Wanggen Fan Changxin.Sinusoid excited nonlinear cochlear model:transfer functions and frequency responses[J].Journal of Xidian University,1992(4). |
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| Authors: | Wan Wanggen Fan Changxin |
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| Affiliation: | Wan Wanggen Fan Changxin |
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| Abstract: | A discrete space method is applied to a sinusoid excited two-dimensional nonlinearcochlear model in which the coordinate x(i.e.,in the longitudinal direction of the basilarmembrane(BM))is discretized.Under the given excitation(stapes velocity),a steady-statevibration velocity of the BM is obtained in time domain and presented in an analytic form.The transfer function of the model is redefined with the BM velocity as output and thestapes velocity as input,and the frequency response of the model is ultimately derived.Ex-perimental results show that the viscosity and nonlinear motion of cochlear fluid are twoprime factors to affect the low frequency slope of frequency responses of cochlea. |
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| Keywords: | viscosity nonlinearity cochlear fluid frequeney response |
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