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Journal of Speech, Language, and Hearing Research Vol.44 73-79 February 2001. doi:10.1044/1092-4388(2001/007)
© American Speech-Language-Hearing Association
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Phonetic Inventory Development in Young Cochlear Implant Users 6 Years Postoperation

Peter J. Blamey 1
Johanna G. Barry 1

Pascale Jacq 1
1 Department of Otolaryngology University of Melbourne East Melbourne, Australia

p.blamey{at}medoto.unimelb.edu.au

Increases in the phonetic inventories of a group of 9 children in the fifth and sixth years of experience with a cochlear implant are reported, extending a previous 4-year study (T. A. Serry & P. J. Blamey, 1999). Thirty-six out of 44 phones in Australian English reached the criterion of 50% correct in the conversational samples of 5 or more children. This level of performance corresponds to intelligible, but not completely natural, speech. The rate of improvement in the sixth year was slow, indicating a probable plateau in performance. The 8 phones that did not attain the 50% criterion in 5 or more children were /I, , , t, s, z, , {theta}/. Potential reasons for the slow development or nondevelopment of these phones include very low frequency of occurrence for /I, , / and the perceptual and articulatory characteristics of /t, s, z, , {theta}/. /t/ is also subject to a high degree of allophonic variation in the fluent speech of normally hearing speakers, probably accounting for much of the variability in its articulation in the conversational samples.

KEY WORDS: phonetic inventory, hearing-impaired, cochlear prosthesis, children, speech

Submitted on December 13, 1999
Accepted on October 20, 2000


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