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Cochlear implant simulator with independent representation of the full spiral ganglion

Grange, Jacques A, Culling, John, Harris, Naomi and Bergfeld, Sven 2017. Cochlear implant simulator with independent representation of the full spiral ganglion. Journal of the Acoustical Society of America 142 (5) , EL484-EL489. 10.1121/1.5009602

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Abstract

In cochlear implant simulation with vocoders, narrow-band carriers deliver the envelopes from each analysis band to the cochlear positions of the simulated electrodes. However, this approach does not faithfully represent the continuous nature of the spiral ganglion. The proposed “SPIRAL” vocoder simulates current spread by mixing all envelopes across many tonal carriers. SPIRAL demonstrated that the classic finding of reduced speech-intelligibility benefit with additional electrodes could be due to current spread. SPIRAL produced lower speech reception thresholds than an equivalent noise vocoder. These thresholds are stable for between 20 and 160 carriers.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Psychology
Subjects: B Philosophy. Psychology. Religion > BF Psychology
R Medicine > RF Otorhinolaryngology
Publisher: Acoustical Society of America
ISSN: 0001-4966
Funders: Oticon Fonden
Date of First Compliant Deposit: 29 November 2017
Date of Acceptance: 17 October 2017
Last Modified: 30 Nov 2017 23:19
URI: http://orca-mwe.cf.ac.uk/id/eprint/107091

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