THE APPLICATION OF SUPRATHRESHOLD STOCHASTIC RESONANCE TO COCHLEAR IMPLANT CODING

In this paper we explore the possibility of using a recently discovered form of stochastic resonance - termed suprathreshold stochastic resonance - to improve speech comprehension in patients fitted with cochlear implants. A leaky-integrate-and-fire (LIF) neurone is used to model cochlear nerve acti...

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Bibliographic Details
Published inFluctuation and noise letters Vol. 2; no. 3; pp. L169 - L181
Main Authors STOCKS, N. G., ALLINGHAM, D., MORSE, R. P.
Format Journal Article
LanguageEnglish
Published World Scientific Publishing Company 01.09.2002
Subjects
cochlear nerve
noise
Suprathreshold stochastic resonance
cochlear implants
information transmission
neural coding
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ISSN0219-4775
1793-6780
DOI10.1142/S0219477502000774

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Summary:In this paper we explore the possibility of using a recently discovered form of stochastic resonance - termed suprathreshold stochastic resonance - to improve speech comprehension in patients fitted with cochlear implants. A leaky-integrate-and-fire (LIF) neurone is used to model cochlear nerve activity when subject to electrical stimulation. This model, in principle, captures key aspects of temporal coding in analogue cochlear implants. Estimates for the information transmitted by a population of nerve fibres is obtained as a function of internal (neuronal) noise level. We conclude that SSR does indeed provide a possible mechanism by which information transmission along the cochlear nerve can be improved - and thus may well lead to improved speech comprehension.
ISSN:0219-4775
1793-6780
DOI:10.1142/S0219477502000774