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Expediting the identification of impaired channels in cochlear implants via analysis of speech-based confusion matrices.

Publication ,  Journal Article
Remus, JJ; Throckmorton, CS; Collins, LM
Published in: IEEE transactions on bio-medical engineering
December 2007

There is significant variability in the benefit provided by cochlear implants to severely deafened individuals. The reasons why some subjects exhibit low speech recognition scores are unknown; however, underlying physiological or psychophysical factors may be involved. Certain phenomena, such as indiscriminable electrodes and nonmonotonic pitch rankings, might hint at limitations in the ability of individual channels in the cochlear implant and/or sensorineural pathway to convey speech information. In this paper, four approaches for analyzing the results of a simple listening test using speech stimuli are investigated for the purpose of targeting channels of concern in order for follow-on psychophysical experiments to correctly identify channels performing in an "impaired" or anomalous manner. Listening tests were first conducted with normal-hearing subjects and acoustic models simulating channel-specific anomalies. Results indicate that these proposed analyses perform significantly better than chance in providing information about the location of anomalous channels. Vowel and consonant confusion matrices from six cochlear implant subjects were also analyzed to test the robustness of the proposed analyses to variability intrinsic to cochlear implant data. The current study suggests that confusion matrix analyses have the potential to expedite the identification of impaired channels by providing preliminary information prior to exhaustive psychophysical testing.

Duke Scholars

Published In

IEEE transactions on bio-medical engineering

DOI

EISSN

1558-2531

ISSN

0018-9294

Publication Date

December 2007

Volume

54

Issue

12

Start / End Page

2193 / 2204

Related Subject Headings

  • Treatment Outcome
  • Therapy, Computer-Assisted
  • Speech Perception
  • Speech Discrimination Tests
  • Sensitivity and Specificity
  • Reproducibility of Results
  • Male
  • Humans
  • Hearing Tests
  • Female
 

Citation

APA
Chicago
ICMJE
MLA
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Remus, J. J., Throckmorton, C. S., & Collins, L. M. (2007). Expediting the identification of impaired channels in cochlear implants via analysis of speech-based confusion matrices. IEEE Transactions on Bio-Medical Engineering, 54(12), 2193–2204. https://doi.org/10.1109/tbme.2007.908336
Remus, Jeremiah J., Chandra S. Throckmorton, and Leslie M. Collins. “Expediting the identification of impaired channels in cochlear implants via analysis of speech-based confusion matrices.IEEE Transactions on Bio-Medical Engineering 54, no. 12 (December 2007): 2193–2204. https://doi.org/10.1109/tbme.2007.908336.
Remus JJ, Throckmorton CS, Collins LM. Expediting the identification of impaired channels in cochlear implants via analysis of speech-based confusion matrices. IEEE transactions on bio-medical engineering. 2007 Dec;54(12):2193–204.
Remus, Jeremiah J., et al. “Expediting the identification of impaired channels in cochlear implants via analysis of speech-based confusion matrices.IEEE Transactions on Bio-Medical Engineering, vol. 54, no. 12, Dec. 2007, pp. 2193–204. Epmc, doi:10.1109/tbme.2007.908336.
Remus JJ, Throckmorton CS, Collins LM. Expediting the identification of impaired channels in cochlear implants via analysis of speech-based confusion matrices. IEEE transactions on bio-medical engineering. 2007 Dec;54(12):2193–2204.

Published In

IEEE transactions on bio-medical engineering

DOI

EISSN

1558-2531

ISSN

0018-9294

Publication Date

December 2007

Volume

54

Issue

12

Start / End Page

2193 / 2204

Related Subject Headings

  • Treatment Outcome
  • Therapy, Computer-Assisted
  • Speech Perception
  • Speech Discrimination Tests
  • Sensitivity and Specificity
  • Reproducibility of Results
  • Male
  • Humans
  • Hearing Tests
  • Female