Pitch sensation involves stochastic resonance

Martignoli, Stefan; Gomez, Florian; Stoop, Ruedi

doi:10.1038/srep02676

Cited by 30 publications

(35 citation statements)

References 25 publications

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“…This model reproduces virtually all mesoscopic biophysical cochlear observations ( [16][17][18][19][20]; in particular Supplemental Material of Refs. [16,18,19]).…”

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confidence: 99%

Auditory Power-Law Activation Avalanches Exhibit a Fundamental Computational Ground State

Stoop

Gomez

2016

Phys. Rev. Lett.

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The cochlea provides a biological information-processing paradigm that we are only beginning to understand in its full complexity. Our work reveals an interacting network of strongly nonlinear dynamical nodes, on which even a simple sound input triggers subnetworks of activated elements that follow power-law size statistics ("avalanches"). From dynamical systems theory, power-law size distributions relate to a fundamental ground state of biological information processing. Learning destroys these power laws. These results strongly modify the models of mammalian sound processing and provide a novel methodological perspective for understanding how the brain processes information.

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“…This model reproduces virtually all mesoscopic biophysical cochlear observations ( [16][17][18][19][20]; in particular Supplemental Material of Refs. [16,18,19]).…”

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confidence: 99%

Auditory Power-Law Activation Avalanches Exhibit a Fundamental Computational Ground State

Stoop

Gomez

2016

Phys. Rev. Lett.

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“…The hardware as well as the software versions of this cochlea reproduce the known biological data extremely well (e.g. [20], Supplemental Materials, [13]). Our cochlea is discretized into sections.…”

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“…We will show that the model fully complies with the presently accepted pitch-related biophysical data [12]. The link to human-perceived pitch and pitch from the cat cochlear nucleus is ensured by the faithfulness of the auditory nerve in relaying the cochlear perceived pitch [13,14]. The hearing model then enables us to further investigate what physics principles are involved in the generation of pitch.…”

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Mammalian pitch sensation shaped by the cochlear fluid

Gomez

Stoop

2014

Nature Phys

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The perceived pitch of a complex harmonic sound changes if the partials of the sound are frequency-shifted by a fixed amount. Simple mathematical rules that the perceived pitch could be expected to follow ('first pitch-shift') are violated in psychoacoustic experiments ('second pitchshift'). For this, commonly cognitive cortical processes were held responsible. Here, we show that human pitch perception can be reproduced from a minimal, purely biophysical, model of the cochlea, by fully recovering the psychoacoustical pitch-shift data of G.F. Smoorenburg (1970) and related physiological measurements from the cat cochlear nucleus. For this to happen, the cochlear fluid plays a distinguished role.

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“…The amplitude equation (2) with n = 1 has been employed in several contexts, such as studies of fluctuations and the response to pitches [57,58]. Here, we examine the physical nature of the forcing and its implications for the resonant response.…”

Section: Frequency Locking Under Additive Vs Parametric Forcingmentioning

confidence: 99%

Frequency locking in auditory hair cells: Distinguishing between additive and parametric forcing

Edri

Bozovic

Yochelis

2016

EPL

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The auditory system displays remarkable sensitivity and frequency discrimination, attributes shown to rely on an amplification process that involves a mechanical as well as a biochemical response. Models that display proximity to an oscillatory onset (a.k.a. Hopf bifurcation) exhibit a resonant response to distinct frequencies of incoming sound, and can explain many features of the amplification phenomenology. To understand the dynamics of this resonance, frequency locking is examined in a system near the Hopf bifurcation and subject to two types of driving forces: additive and parametric. Derivation of a universal amplitude equation that contains both forcing terms enables a study of their relative impact on the hair cell response. In the parametric case, although the resonant solutions are 1:1 frequency locked, they show the coexistence of solutions obeying a phase shift of π, a feature typical of the 2:1 resonance. Different characteristics are predicted for the transition from unlocked to locked solutions, leading to smooth or abrupt dynamics in response to different types of forcing. The theoretical framework provides a more realistic model of the auditory system, which incorporates a direct modulation of the internal control parameter by an applied drive. The results presented here can be generalized to many other media, including Faraday waves, chemical reactions, and elastically driven cardiomyocytes, which are known to exhibit resonant behavior.

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Pitch sensation involves stochastic resonance

Cited by 30 publications

References 25 publications

Auditory Power-Law Activation Avalanches Exhibit a Fundamental Computational Ground State

Auditory Power-Law Activation Avalanches Exhibit a Fundamental Computational Ground State

Mammalian pitch sensation shaped by the cochlear fluid

Frequency locking in auditory hair cells: Distinguishing between additive and parametric forcing

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