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Speech Production Intelligibility Is Associated with Speech Recognition in Adult Cochlear Implant Users
Victoria A Sevich1, Davia J Williams2, Aaron C Moberly2
1Department of Speech and Hearing Science, The Ohio State University, Columbus, OH 43210, USA.
Speech intelligibility in adult cochlear implant (CI) users is linked to their speech recognition accuracy. Further research is needed to understand the role of phonological processing in this relationship.
Area of Science:
- Audiology
- Speech Science
- Neuroscience
Background:
- Adult cochlear implant (CI) users show varied speech outcomes.
- Degraded auditory feedback from CIs can reduce speech intelligibility by affecting acoustic-phonetic vowel space and phonological representations.
Purpose of the Study:
- To investigate the connection between subjective speech intelligibility ratings, acoustic speech production measures, speech recognition accuracy, and phonological processing in adult CI users.
Main Methods:
- Fifteen adult CI users produced speech, analyzed for vowel distinctiveness.
- Normal-hearing listeners rated the intelligibility of CI users' speech.
- CI users completed speech recognition and phonological processing tasks.
Main Results:
- Higher subjective intelligibility ratings correlated with better speech recognition accuracy.
- Vowel distinctiveness showed a marginal association with speech recognition but not with phonological processing or intelligibility ratings.
- Intelligibility ratings had a marginal relationship with phonological processing.
Conclusions:
- Speech intelligibility ratings are associated with speech recognition in adult CI users.
- Future research should explore the mediating role of individual differences in phonological processing on this relationship.
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