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The Importance of Frequency Regions for Cochlear Implant Patients

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The Importance of Frequency Regions for Cochlear Implant Patients

November 12, 2015 In the News

Sladen and Ricketts (2015) report that given current cochlear implant (CI) technology, the majority of post-lingually deafened adults achieve 80 percent word recognition (in quiet) after only six months experience with a CI. In their study, CI users were presented with monaural information and the NH listeners had binaural input. The noisy condition was a 10 dB SNR with six-talker babble. Of note, “the average decrease in performance between quiet and noisy conditions was 13% for the NH group and 20 percent for the CI group.”  

The authors report that in their study of 9 adults with normal hearing (NH) and 9 adults with cochlear implants (CIs), in quiet, the adults with NH appear to place greater listening emphasis on particular bands of spectral information, whereas adults using CIs apply equal listening emphasis across all bands. In noise, “the shape of the frequency importance function remained the same….” That is, for people with NH and people with CIs, the spectral information that was important “for speech understanding in quiet were the same bands that were important for speech understanding in noise.” 

For More Information, References, and Recommendations

Sladen DP, Ricketts TA. (2015) Frequency Importance Functions in Quiet and Noise for Adults With Cochlear Implants. American Journal of Audiology. September.

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