Vowel confusion patterns in adults during initial 4 years of implant use
| Autor: | Taina Välimaa, Martti Sorri, Ville Sivonen, Jaakko Laitakari, Arto A. Muhli |
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| Rok vydání: | 2010 |
| Předmět: |
Adult
Male Linguistics and Language medicine.medical_specialty Time Factors Speech perception medicine.medical_treatment Deafness Audiology behavioral disciplines and activities Language and Linguistics Young Adult Speech and Hearing Phonetics Vowel Cochlear implant medicine Humans Pitch Perception Aged musculoskeletal neural and ocular physiology Middle Aged Cochlear Implantation Formant Mid vowel Speech Discrimination Tests Speech Perception behavior and behavior mechanisms Female Implant Syllable Psychology psychological phenomena and processes |
| Zdroj: | Clinical Linguistics & Phonetics. 25:121-144 |
| ISSN: | 1464-5076 0269-9206 |
| Popis: | This study investigated adult cochlear implant users' (n = 39) vowel recognition and confusions by an open-set syllable test during 4 years of implant use, in a prospective repeated-measures design. Subjects' responses were coded for phoneme errors and estimated by the generalized mixed model. Improvement in overall vowel recognition was highest during the first 6 months, showing statistically significant change until 4 years, especially for the mediocre performers. The best performers improved statistically significantly until 18 months. The poorest performers improved until 12 months and exhibited more vowel confusions. No differences were found in overall vowel recognition between Nucleus24M/24R and Med-ElC40+ device users (matched comparison), but certain vowels showed statistically significant differences. Vowel confusions between adjacent vowels were evident, probably due to the implant users' inability to discriminate formant frequencies. Vowel confusions were also dominated by vowels whose average F1 and/or F2 frequencies were higher than the target vowel, indicating a basalward shift in the confusions. |
| Databáze: | OpenAIRE |
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