Dynamics of cochlear nonlinearity

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Altoè, Alessandro
dc.contributor.author Charaziak, Karolina K.
dc.contributor.author Shera, Christopher A.
dc.date.accessioned 2018-08-01T12:42:43Z
dc.date.available 2018-08-01T12:42:43Z
dc.date.issued 2017-12-01
dc.identifier.citation Altoè , A , Charaziak , K K & Shera , C A 2017 , ' Dynamics of cochlear nonlinearity : Automatic gain control or instantaneous damping? ' Journal of the Acoustical Society of America , vol 142 , no. 6 , pp. 3510-3519 . DOI: 10.1121/1.5014039 en
dc.identifier.issn 0001-4966
dc.identifier.issn 1520-8524
dc.identifier.other PURE UUID: 56ff3458-5d1e-4468-97e7-c51865f7617b
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/dynamics-of-cochlear-nonlinearity(56ff3458-5d1e-4468-97e7-c51865f7617b).html
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=85038435296&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/26511357/1.5014039.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/32768
dc.description.abstract Measurements of basilar-membrane (BM) motion show that the compressive nonlinearity of cochlear mechanical responses is not an instantaneous phenomenon. For this reason, the cochlear amplifier has been thought to incorporate an automatic gain control (AGC) mechanism characterized by a finite reaction time. This paper studies the effect of instantaneous nonlinear damping on the responses of oscillatory systems. The principal results are that (i) instantaneous nonlinear damping produces a noninstantaneous gain control that differs markedly from typical AGC strategies; (ii) the kinetics of compressive nonlinearity implied by the finite reaction time of an AGC system appear inconsistent with the nonlinear dynamics measured on the gerbil basilar membrane; and (iii) conversely, those nonlinear dynamics can be reproduced using an harmonic oscillator with instantaneous nonlinear damping. Furthermore, existing cochlear models that include instantaneous gain-control mechanisms capture the principal kinetics of BM nonlinearity. Thus, an AGC system with finite reaction time appears neither necessary nor sufficient to explain nonlinear gain control in the cochlea. en
dc.format.extent 10
dc.format.extent 3510-3519
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries Journal of the Acoustical Society of America en
dc.relation.ispartofseries Volume 142, issue 6 en
dc.rights openAccess en
dc.subject.other Arts and Humanities (miscellaneous) en
dc.subject.other Acoustics and Ultrasonics en
dc.subject.other 213 Electronic, automation and communications engineering, electronics en
dc.title Dynamics of cochlear nonlinearity en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Signal Processing and Acoustics
dc.contributor.department University of Southern California
dc.subject.keyword Arts and Humanities (miscellaneous)
dc.subject.keyword Acoustics and Ultrasonics
dc.subject.keyword 213 Electronic, automation and communications engineering, electronics
dc.identifier.urn URN:NBN:fi:aalto-201808014168
dc.identifier.doi 10.1121/1.5014039
dc.type.version publishedVersion

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