Percepção da fala em crianças usuárias de implante coclear com duas estratégias de processamento do sinal do sistema HiResolution / Speech perception in children with cochlear implants with two sound processing strategy of the HiResolution system

AUTOR(ES)

Tatiana Mendes de Melo

FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

22/10/2012

RESUMO

Improvements in speech perception with cochlear implant (CI) over the years is related, among others factors, to the technological advance of the sound processing strategy. The purpose of the present study was to investigate speech perception performance in CI children, with two different Advanced Bionics sound processing strategy. Subjects were 11 prelingually deafened children implanted with the HiRes 90K cochlear implant and used a bodyworn platinum sound processor. All subjects showed evidence of open-set speech recognition. A within-subjects design was used to compare performance with standard HiRes and HiRes 120. Baseline performance was assessed with HiResolution 120 (HiRes 120). Subjects then were fitted with HiResolution (HiRes) and returned for re-evaluation after three months of use. After three months of HiRes experience, subjects were refitted with HiRes 120 and returned three months later for reassessment. During test sessions, subject\ s performance was evaluated by warble-tone sound-field thresholds, the Brazilian Hearing in Noise test (HINT) in quiet and in noise and Parents\ Evaluation of Aural/oral Performance of Children questionnaire (PEACH). The detection thresholds, the speech perception in quiet and the CI benefit in daily life were similar for both sound processing strategy. There was a trend toward better hearing performance in noise with HiRes 120, although this result was not statistically significant. This trend indicates that more precise spectral representation of the acoustic signal provided by the HiRes 120 can result in an improvement in the speech perception in noise by CI children. However, this characteristic did not influence the auditory performance in quiet. It reinforces the importance of clinical observation and speech perception in noise assessment in the sound processing strategy selection, in order to optimize the auditory performance of CI users.

ASSUNTO(S)

avaliação de resultados cochlear implant evaluation of results hearing loss implante coclear percepção da fala perda auditiva speech perception

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