TITLE

Phoneme Recognition and Confusions With Multichannel Cochlear Implants: Vowels

AUTHOR(S)
Valimaa, Taina T.; Maatta, Taisto K.; Lopponen, Heikki J.; Sorri, Martti J.
PUB. DATE
October 2002
SOURCE
Journal of Speech, Language & Hearing Research;Oct2002, Vol. 45 Issue 5, p1039
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The aim of this study was to investigate how postlingually severely or profoundly hearing-impaired adults relearn to recognize vowels after receiving multichannel cochlear implants. Vowel recognition of 19 Finnish-speaking subjects was studied for a minimum of 6 months and a maximum of 24 months using an open-set nonsense-syllable test in a prospective repeated-measure design. The responses were coded for phoneme errors, and 95% confidence intervals for recognition and confusions were calculated. The average vowel recognition was 68% (95% confidence interval = 66-70%) 6 months after switch-on and 80% (95% confidence interval = 78-82%) 24 months after switch-on. The vowels [æ], [u], [i], [o], and [a] were the easiest to recognize, and the vowels [y], [e], and [ø] were the most difficult. In conclusion, adaptation to electrical hearing using a multichannel cochlear implant was achieved well; but for at least 2 years, given two vowels with either F1 or F2 at roughly the same frequencies, confusions were drawn more towards the closest vowel with the next highest F1 or F2.
ACCESSION #
7506482

 

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