语音激励下的耳蜗传输特性

Transfer Characteristics of Cochlea Excited by Speech Signal

本文根据语音可以表示为有限项正弦级数的理论，在把耳蜗流体视为实际的粘性流体的条件下，建立了一种新的听觉模型，并在频域上求出了模型的传输函数。本文给出的听觉模型与传统的听觉模型在数学结构上非常接近，所不同的是前者避免了求格林函数以及由此而带来的卷积运算，因此，结构更加简化，在不计及中耳影响的条件下，新模型的传输特性曲线比传统模型的传输特性曲线有较大的改进。

According to the theory that speech can be represented as a sum of sinusoidal waves,a new auditory model is developed on condition that cochlear fluid is considered as actual viscous fluid. Transfer function of the model is obtained in frequency domain. Mathematical structure of the model is very similar to that of traditional auditory model except that there is no Green's function and convolution computation in the new model,so the new model is much more sinpler than the traditional one in strueture. Without considering the effect of middle ear,transfer function of the new model is much more improved than that of traditionol one.