Berlin 2012 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 9: Statistical Physics of Biological Systems II (with BP, talks from BP)
DY 9.7: Talk
Monday, March 26, 2012, 16:30–16:45, H 1058
Time domain representation of active nonlinear cochlear waves — •Florian Fruth1,2, Frank Jülicher1, and Benjamin Lindner2 — 1Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Straße 38, 01187 Dresden — 2Bernstein Center for Computational Neuroscience, Philippstr. 13, Haus 2, 10115 Berlin
The inner ear, the so called cochlea, can be modeled generically in terms of coupled critical oscillators, which has been done previously in the frequency (Fourier) domain. This one-dimensional model describes a nonlinear cochlear wave that is pumped by active oscillators. We extend and generalize this model by constructing a similar version in time domain, in order to include dynamical noise (originating, e.g. in the stochastic activity of outer hair cells) and static disorder (resulting from inhomogeneities of system parameters along the cochlea). We discuss the spontaneous oscillations in the model and also investigate its response to external stimuli such as clicks or pure tones.