Essential nonlinearities in hearing
Essential nonlinearities in hearing
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DOI：
10.1103/physrevlett.84.5232
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发表时间：
2000-05-29
影响因子：
8.6
通讯作者：
Magnasco, MO
中科院分区：
文献类型：
--
作者：
Eguíluz, VM;Ospeck, M;Magnasco, MO
显然，我们的听力器官--耳蜗会在霍普夫分叉处保持平衡，以最大限度地调谐和放大。我们表明，在这种情况下，几个效应是一般的：压缩动态范围，在零输入时无限尖锐的调谐，以及产生组合音调。这些影响本质上是一种非线性，因为强迫越小，它们就变得越明显：没有足够柔和的声音来不唤起它们。因此，听证的所有有据可查的非线性方面似乎都是同一基本机制的结果。
Our hearing organ, the cochlea, evidently poises itself at a Hopf bifurcation to maximize tuning and amplification. We show that in this condition several effects are expected to be generic: compression of the dynamic range, infinitely sharp tuning at zero input, and generation of combination tones. These effects an "essentially" nonlinear in that they become more marked the smaller the forcing: there is no audible sound soft enough not to evoke them. All the well-documented nonlinear aspects of hearings therefore appear to be consequences of the same underlying mechanism.