Journal article
Effects of converting bilateral cochlear implant subjects to a strategy with increased rate and number of channels
Annals of otology, rhinology & laryngology, Vol.115(6), pp.425-432
06/2006
DOI: 10.1177/000348940611500605
PMID: 16805373
Abstract
Three different Advanced Bionics processing strategies were evaluated: 1) 8-channel, 813 pulses per second (pps), Continuous Interleaved Sampling (CIS); 2) 16-channel, 5,100 pps, HiResolution Paired (HiRes P); and 3) 16-channel, 2,900 pps, HiResolution Sequential (HiRes S).
Seven adult bilateral Clarion CII cochlear implant recipients who had been using a CIS processing strategy for at least 18 months participated in this study. Sentence recognition in multitalker babble from the front was collected on subjects using their CIS strategy and after subjects were programmed for the first time with HiRes P and HiRes S strategies. An ABAB design was implemented for 1 month whereby subjects used each HiResolution strategy every other day. Sentence recognition testing was repeated at the 1- and 3-month post-HiResolution test intervals.
Comparisons between the CIS and HiResolution strategies showed immediate improvements for 5 subjects in favor of the HiResolution strategies. After 1 month of alternating between the HiRes P and HiRes S strategies, remarkably, 2 subjects showed improvements of 60%, 2 subjects showed improvements of 40%, and 2 subjects showed improvements of 30% over the CIS strategy that they had previously used for at least 18 months. The results after 3 months of use were consistent with those obtained at 1 month.
The HiRes S and HiRes P strategies resulted in dramatic improvements in speech perception in noise for a subset of subjects who had been using the CIS strategy bilaterally. This finding demonstrates that these subjects were able to tolerate a more difficult signal-to-noise ratio. Further work is needed to determine the independent effects of rate versus number of channels.
Details
- Title: Subtitle
- Effects of converting bilateral cochlear implant subjects to a strategy with increased rate and number of channels
- Creators
- Camille C Dunn - Dept of Otolaryngology-Head and Neck Surgery, University of Iowa, 21038, Iowa City, IA 52242-1078, USARichard S TylerShelley A WittBruce J Gantz
- Resource Type
- Journal article
- Publication Details
- Annals of otology, rhinology & laryngology, Vol.115(6), pp.425-432
- Publisher
- United States
- DOI
- 10.1177/000348940611500605
- PMID
- 16805373
- ISSN
- 0003-4894
- eISSN
- 1943-572X
- Grant note
- P50 DC000242 / NIDCD NIH HHS 2 P50 DC00242 / NIDCD NIH HHS
- Language
- English
- Date published
- 06/2006
- Academic Unit
- Communication Sciences and Disorders; Neurosurgery; Otolaryngology
- Record Identifier
- 9984007300102771
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