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Power-laws and loss of power-laws in the Tuned Cochlea


Gomez, F; Lorimer, T; Stoop, R (2014). Power-laws and loss of power-laws in the Tuned Cochlea. In: 2014 International Symposium on Nonlinear Theory and its Application (NOLTA), Luzern, Switzerland, 14 September 2014 - 18 September 2014, 656-659.

Abstract

The mammalian cochlea is a sophisticated hearing sensor that uses active amplification to enhance weak sounds. The nonlinearity necessary for this task allows a remarkable dynamic range, yet at the same time it removes the superposition principle, resulting in complex interactions of the incoming frequencies and the generation of new frequencies (combination tones). Using a biophysically realistic mesoscopic model of the cochlea, we show that the processing of sound mixtures produces activity profiles consistent with power-laws. Importantly, if the cochlea is parameter-tuned in a way that was earlier shown to effectively model the process of active listening, the power-law distribution is broken.

Abstract

The mammalian cochlea is a sophisticated hearing sensor that uses active amplification to enhance weak sounds. The nonlinearity necessary for this task allows a remarkable dynamic range, yet at the same time it removes the superposition principle, resulting in complex interactions of the incoming frequencies and the generation of new frequencies (combination tones). Using a biophysically realistic mesoscopic model of the cochlea, we show that the processing of sound mixtures produces activity profiles consistent with power-laws. Importantly, if the cochlea is parameter-tuned in a way that was earlier shown to effectively model the process of active listening, the power-law distribution is broken.

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Additional indexing

Item Type:Conference or Workshop Item (Paper), refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Neuroinformatics
Dewey Decimal Classification:570 Life sciences; biology
Language:English
Event End Date:18 September 2014
Deposited On:23 Feb 2015 16:04
Last Modified:08 Dec 2017 11:32
Publisher:Proceedings of the 2014 Nonlinear Theory and its Applications (NOLTA) Symposium
Series Name:NOLTA 2014 Proceedings
Official URL:http://chaos.keiei.shikoku-u.ac.jp/NOLTA14/

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