Comparison of two frequency-to-electrode maps for acoustic-electric stimulation.

Abstract:

:The fitting of a cochlear implant together with aided residual hearing was evaluated by means of matching frequency and/or perceived pitch between acoustic and electric modalities. Five cochlear implant users with the Nucleus Freedom electrode array with residual acoustic hearing participated. Psychophysical procedures were used to create a map in which the implant was programmed to provide the listener with high-frequency information only above the frequency at which acoustic hearing was no longer considered useful. This was compared to a second map which provided the full frequency range. Listeners wore each map for a number of weeks before speech recognition was measured in quiet and noise. Post-operatively across subjects, average hearing thresholds worsened by 27 dB. However, cochlear implantation provided superior recognition of speech compared to pre-operative scores, with the best results found when subjects were wearing their hearing aids together with the implant. No significant differences were found between the two maps on speech tests when subjects were wearing their implant together with hearing aid/s. In conclusion, the combination of a cochlear implant together with hearing aid/s was effective at providing speech perception benefits for the listeners of the current study, regardless of the frequency-to-electrode allocation selected.

journal_name

Int J Audiol

authors

Simpson A,McDermott HJ,Dowell RC,Sucher C,Briggs RJ

doi

10.1080/14992020802452184

subject

Has Abstract

pub_date

2009-02-01 00:00:00

pages

63-73

issue

2

eissn

1499-2027

issn

1708-8186

pii

908703456

journal_volume

48

pub_type

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