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Updated: Mar 13, 2026

Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
Published on: March 24, 2023
Comparison of two cochlear implant coding strategies on speech perception
Margaret T Dillon1, Emily Buss1, English R King2
1a Department of Otolaryngology/Head and Neck Surgery , University of North Carolina at Chapel Hill , USA.
Objective:
Assess whether differences in speech perception are observed after exclusive listening experience with high-definition continuous interleaved sampling (HDCIS) versus fine structure processing (FSP) coding strategies.
Methods:
Subjects were randomly assigned at initial activation of the external speech processor to receive the HDCIS or FSP coding strategy. Frequency filter assignments were consistent across subjects. The speech perception test battery included CNC words in quiet, HINT sentences in quiet and steady noise (+10 dB SNR), AzBio sentences in quiet and a 10-talker babble (+10 dB SNR), and BKB-SIN. Assessment intervals included 1, 3, and 6 months post-activation.
Results:
Data from 22 subjects (11 with HDCIS and 11 with FSP) were assessed over time. Speech perception performance was not significantly different between groups.
Discussion:
Speech perception performance was not significantly different after 6 months of listening experience with the HDCIS or FSP coding strategy.
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