Speech recognition in quiet and noise background situation in children with cochlear implants using two different speech processors / Reconhecimento de fala com e sem ruído competitivo em crianças usuárias de implante coclear utilizando dois diferentes processadores de fala

AUTOR(ES)

Fabiana Danieli

DATA DE PUBLICAÇÃO

2010

RESUMO

The children with multichannel cochlear implants have show significant improvements in speech perception, mainly due to advances in techniques of processing the sound of this device. The objective was to study comparatively the speech recognition skills in quiet and noise background situation in children with cochlear implants using two different speech processors. Were evaluated 26 children with cochlear implant device Nucleus 24M or 24K, Cochlear Corporation, divided in two groups according to the speech processor used. The group 1 consisted of 16 children who used the Sprint processor, mean age of 8 years and two months, mean hearing sensorial privation 2 years and 1 month and mean time of implant use 6 years. The group 2 consisted of 10 children who used the Freedom processor, mean age of 9 years and nine months, mean sensorial privation 2 years and three months and mean time of implant use 7 years and three months. The HINT/Brazil (Hearing in Noise Test - Portuguese version of Brazil) was applied in the sound field in quiet (0° azimuth) and noise background situation (source location for the speech 0° and 180° for noise). Speech recognition performance of groups was compared in quiet and noise background situation, as well as the distribution of the groups in age, sensorial privation and duration of implant use. The speech recognition performance of group 2 (Freedom) was higher than in group 1 (Sprint) in all evaluation situations, with significant difference between groups only on quiet situation. There were no significant differences of the variables age, time of sensorial privation and time of implant use between the groups. The components of the signal processing available on the Nucleus Freedom processor may have contributed to the better speech recognition performance of group 2. Further research is needed to complement these findings.

ASSUNTO(S)

noise cochlear implant speech perception child ruído percepção de fala criança implante coclear

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