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Tuning the Hopf Cochlea towards listening


Gomez, Florian; Stoop, Ruedi (2012). Tuning the Hopf Cochlea towards listening. In: 20th edition of the Nonlinear Dynamics of Electronic Systems, NDES 2012 , Wolfenbuettel, Germany, 11 July 2012 - 13 July 2012, 1-4.

Abstract

The Hopf Cochlea is a hard- and software implemented model of the mammalian cochlea that is constructed from a series of feedforward coupled nonlinear Hopf system amplifier sections. All salient nonlinear aspects of hearing can be traced back to the physical properties of the Hopf oscillators. At each location along the cochlea, the amplification strength is effectively governed by a single real parameter characterizing the distance of the Hopf oscillator from the Hopf-bifurcation point. Using these parameters, given a mixture of input signals (e.g., a set of musical instruments) it should be possible to tune the cochlea towards a single sound component. Introducing an autocorrelation-based tuning measure, we demonstrate the tunability of the Hopf Cochlea on recorded real-life instruments of different timbres and pitches. Despite the strongly nonlinear and therefore interaction-prone nature of the device, strong and simple tuning patterns permit an easy tuning to sounds of varying pitch.

Abstract

The Hopf Cochlea is a hard- and software implemented model of the mammalian cochlea that is constructed from a series of feedforward coupled nonlinear Hopf system amplifier sections. All salient nonlinear aspects of hearing can be traced back to the physical properties of the Hopf oscillators. At each location along the cochlea, the amplification strength is effectively governed by a single real parameter characterizing the distance of the Hopf oscillator from the Hopf-bifurcation point. Using these parameters, given a mixture of input signals (e.g., a set of musical instruments) it should be possible to tune the cochlea towards a single sound component. Introducing an autocorrelation-based tuning measure, we demonstrate the tunability of the Hopf Cochlea on recorded real-life instruments of different timbres and pitches. Despite the strongly nonlinear and therefore interaction-prone nature of the device, strong and simple tuning patterns permit an easy tuning to sounds of varying pitch.

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Additional indexing

Item Type:Conference or Workshop Item (Speech), refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Neuroinformatics
Dewey Decimal Classification:570 Life sciences; biology
Language:English
Event End Date:13 July 2012
Deposited On:28 Feb 2013 07:38
Last Modified:08 Aug 2017 09:56
Publisher:IEEE
Number of Pages:4
ISBN:978-3-8007-3444-3

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