Eguíluz V M, Ospeck M, Choe Y, Hudspeth A J, Magnasco M O
Instituto Mediterráneo de Estudios Avanzados IMEDEA (CSIC-UIB), E-07071 Palma de Mallorca, Spain.
Phys Rev Lett. 2000 May 29;84(22):5232-5. doi: 10.1103/PhysRevLett.84.5232.
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 are "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 hearing therefore appear to be consequences of the same underlying mechanism.
我们的听觉器官——耳蜗，显然处于霍普夫分岔状态，以实现调谐和放大的最大化。我们表明，在这种情况下，预计会出现几种普遍效应：动态范围的压缩、零输入时无限尖锐的调谐以及组合音的产生。这些效应“本质上”是非线性的，因为驱动力越小，它们就越明显：不存在软到听不到这些效应的声音。因此，所有已充分记录的听觉非线性方面似乎都是同一潜在机制的结果。
