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CASE STUDY
SUPRASEGMENTAL FEATURES OF CI CHILDREN VIA
CLASSIFICATION OF PRE-LINGUISTIC UTTERANCES:
TWO LONGITUDINAL CASE STUDIES
1
Department of Educational & Social Policy, University of Macedonia, Egnatias 156, 54006, Thessaloniki, Greece
2
Department of Linguistics, University of Athens, Athens 15784, Greece
3
Academic ENT Department of Medicine, Aristotle University of Thessaloniki, AHEPA Hospital, 54006, Greece
Publication date: 2013-03-31
Corresponding author
Paraskevas Binos
Paraskevas Binos, Department of Educational & Social Policy, University of Macedonia, Egnatias 156, 54006, Thessaloniki, Greece, Phone: +306934223402, e-mail: pariss61@hotmail.com
Paraskevas Binos, Department of Educational & Social Policy, University of Macedonia, Egnatias 156, 54006, Thessaloniki, Greece, Phone: +306934223402, e-mail: pariss61@hotmail.com
J Hear Sci 2013;3(1):37-46
KEYWORDS
cochlear implantsinfant vocalizations post-implantspeech productionprelingual deafnessprosodic features
ABSTRACT
Background:
The speech prosody of young children who have CIs has not been the subject of detailed investigation. This case study is a longitudinal investigation of the vocalizations of two young children with CIs. The aims were to examine the suprasegmental characteristics of the prelinguistic utterances of these CI children and to develop a method for deriving phonoprosodic classifications using acoustical and auditory analyses.
Material and Method:
Spontaneous productions by two congenitally hearing-impaired Greek children fitted with a Nucleus-24 multichannel CI (ages 1: 10 and 2: 7; post-implant ages 0: 0 and 0: 6) were sampled for 6 months and, following transcription, classification of protophones was made. The analysis aimed to detect the frequency of occurrence of different protophone types in the infants’ utterances and to examine utterance duration and pitch contour via spectrography. Utterance characteristics were analyzed in relation to a) child’s age and b) post-implant age.
Results:
At post-implant age of 6 months, the younger and earlier implanted child showed more prelinguistic vocalizations and more complex structures than the older, later fitted child. The older, later CI recipient produced CV vocalizations at the beginning of implantation and gained a facility for frequent CV productions after 4 months of CI use.
Conclusions:
The findings are in agreement with other studies which observe that later CI recipients produce CV combinations at earlier phases of the prelexical period until the necessary auditory input is provided by CIs. Protophone vocalizations serve as a comparative parameter of speech production level in pre-lingual speech.
The speech prosody of young children who have CIs has not been the subject of detailed investigation. This case study is a longitudinal investigation of the vocalizations of two young children with CIs. The aims were to examine the suprasegmental characteristics of the prelinguistic utterances of these CI children and to develop a method for deriving phonoprosodic classifications using acoustical and auditory analyses.
Material and Method:
Spontaneous productions by two congenitally hearing-impaired Greek children fitted with a Nucleus-24 multichannel CI (ages 1: 10 and 2: 7; post-implant ages 0: 0 and 0: 6) were sampled for 6 months and, following transcription, classification of protophones was made. The analysis aimed to detect the frequency of occurrence of different protophone types in the infants’ utterances and to examine utterance duration and pitch contour via spectrography. Utterance characteristics were analyzed in relation to a) child’s age and b) post-implant age.
Results:
At post-implant age of 6 months, the younger and earlier implanted child showed more prelinguistic vocalizations and more complex structures than the older, later fitted child. The older, later CI recipient produced CV vocalizations at the beginning of implantation and gained a facility for frequent CV productions after 4 months of CI use.
Conclusions:
The findings are in agreement with other studies which observe that later CI recipients produce CV combinations at earlier phases of the prelexical period until the necessary auditory input is provided by CIs. Protophone vocalizations serve as a comparative parameter of speech production level in pre-lingual speech.
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