Faculty of Education - Theses

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Author: Sanna, Sarina × End date: 2019 × Type: Masters Research thesis × Subject: Education × Subject: Hearing impaired children × Subject: Study and teaching ×

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    The emergence of consonants in severe to profoundly hearing impaired pre-school aged children using hearing aids or cochlear implant
    Sanna, Sarina ( 1997)
    The Nucleus 22 Electrode Cochlear Implant is being implanted in young, severe to profound hearing impaired children with the anticipation that spontaneous speech production will develop more in line with what is expected in normal hearing children This study investigated the early emergence of consonantal sounds in the spontaneous speech production of two groups of pre school aged children. The first group consisted of five children implanted with the Nucleus 22 Electrode Cochlear Implant and using the Multipeak Speech Processor (MSP). The second group of five children wore electronic hearing aids and had at least some aided thresholds in the speech spectrum. The consonantal inventories of each subject, collected over a thirteen month period, were compared within the subject groups, between the subject groups and also to literature discussing consonantal emergence in children with normal hearing. All subjects in this study were found to have increased the number of consonants in their consonantal inventories by the end of the thirteen month period. This result indicated that both devices were of some use to the subjects. Neither group showed a consistently larger increase in the number of new consonants that had emerged by the final inventory. The assortment of consonants emerging in the consonantal inventories of the subjects was also investigated and found to vary more on an individual basis rather than a group basis. However, the results did show that more implanted subjects had the consonants /s/, /w/ and / / in their inventories by the end of the study. More aided subjects had / / and /h/ in their consonantal inventories by the end of the study. Although being an average 12 months older than the aided subjects, more implanted subjects had consonants in their inventories that required the perception of high frequency cues. This study also showed two other interesting trends. Firstly, both subject groups had individuals that did not progress as well as expected. Secondly, the implanted subjects produced the unvoiced stops /p,t,k/ and the unvoiced fricative / / more often than the aided subjects.