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Environmental sound recognition following CI (Harris et al., 2021)

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posted on 2021-03-02, 23:58 authored by Michael S. Harris, Aaron C. Moberly, Ben L. Hamel, Kara Vasil, Christina L. Runge, William J. Riggs, Valeriy Shafiro
Purpose: The aims of this study were (a) to longitudinally assess environmental sound recognition (ESR) before and after cochlear implantation in a sample of postlingually deafened adults and (b) to assess the extent to which spectro-temporal processing abilities influence ESR with cochlear implants (CIs).
Method: In a longitudinal cohort study, 20 postlingually deafened adults were tested with hearing aids on the Familiar Environmental Sound Test–Identification and AzBio sentences in quiet pre-CI and 6 months post-CI. A subset of 11 participants were also tested 12 months post-CI. Pre-CI spectro-temporal processing was assessed using the Spectral-temporally Modulated Ripple Test.
Results: Average ESR accuracy pre-CI (M = 63.60%) was not significantly different from ESR accuracy at 6 months (M = 65.40%) or 12 months (M = 69.09%) post-CI. In 11 participants (55%), however, ESR improved following implantation by 10.91 percentage points, on average. Pre-CI ESR correlated moderately and significantly with pre-CI and 12-month post-CI AzBio scores, with a trend toward significance for AzBio performance at 6 months. Pre-CI spectro-temporal processing was moderately associated with ESR at 6 and 12 months post-CI but not with speech recognition post-CI.
Conclusions: The present findings failed to demonstrate an overall significant improvement in ESR following implantation. Nevertheless, more than half of our sample showed some degree of improvement in ESR. Several environmental sounds were poorly identified both before and after implantation. Spectro-temporal processing ability prior to implantation appears to predict postimplantation performance for ESR. These findings indicate the need for greater attention to ESR following cochlear implantation and for developing individualized targets for ESR rehabilitation.

Supplemental Material S1. Confusion Matrix - Percent Correct Pre-Cochlear Implant; Confusion Matrix - Percent Correct Six-Months Post-Cochlear Implant.

Harris, M. S., Moberly, A. C., Hamel, B. L., Vasil, K., Runge, C. L., Riggs, W. J., & Shafiro, V. (2021). A longitudinal comparison of environmental sound recognition in adults with hearing aids before and after cochlear implantation. Journal of Speech, Language, and Hearing Research. Advance online publication.


This study was supported by the Triological Society Career Development Award and American Neurotology Society Research Award (awarded toM. S. H.); American Otological Society Clinician- Scientist Award, National Institute on Deafness and Other Communication Disorders Career Development Award 5K23DC015539-02, and other research supported by Cochlear Corp. (awarded to A. C. M.); 2018 AΩA Carolyn L. Kuckein Student Research Fellowship (awarded to B. L. H.); and American Speech-Language- Hearing Foundation Clinical Research Grant and Capita Foundation grant (awarded to V. S.).