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Patterns of phoneme perception errors by listeners with cochlear implants as a function of overall speech perception
Benjamin Munson1, Gail S Donaldson, Shanna L Allen
1Department of Communication Disorders, University of Minnesota, 115 Shevlin Hall, 164 Pillsbury Drive SE, Minneapolis, Minnesota 55455, USA.
The Journal of the Acoustical Society of America
|February 25, 2003
Summary
Cochlear implant users
Area of Science:
- Audiology
- Neuroscience
- Speech-Language Pathology
Background:
- Significant variability exists in speech perception among postlingually deafened adults using cochlear implants (CIs).
- Understanding factors influencing CI speech perception is crucial for improving patient outcomes.
Purpose of the Study:
- To investigate qualitative differences in phoneme feature perception between CI users with better and poorer speech perception.
- To determine if performance variations are quantitative or qualitative.
Main Methods:
- Analyzed phoneme misperceptions in 30 postlingually deafened adult CI users (Nucleus-22, Clarion 1.2).
- Utilized regression analysis to compare consonant and vowel perception scores between better and poorer performing groups.
- Examined information transmission patterns for phoneme features.
Main Results:
- A strong correlation was observed for consonant identification between better and poorer performing groups.
- A weak, non-significant correlation was found for vowel identification.
- Poorer performing CI users transmitted less information for both consonant and vowel features, but the pattern was similar across groups.
Conclusions:
- Performance differences in speech perception for cochlear implant users appear primarily quantitative rather than qualitative.
- Assessing individual phoneme feature perception is vital for understanding speech perception variability and its predictors in CI users.