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Introduction: Hearing impaired children aided with listening devices (cochlear implant (CI)/ hearing aids (HA)) develop auditory feedback skills with time, hence improving their speech, language and voice characteristics. Aim: The study aims to compare acoustical voice parameters across a group of children using CI/ HA with children using signed language and normal hearing children group. Method and Materials: A total of 32 children were recruited for this study. Each Group 1, 2, 3, & 4 consisted of equal number of 8, CI, HA, Sign Language and Normal Hearing children respectively. The age range was 3 to 8 years for male and female in all participants. Instrument Used: Computerised Speech Lab (CSL), Model 4500 (Pentax Medical, Japan). Voice analysis was carried out by sustained phonation for the vowel /a/ for all participants. Results and Discussion All the groups were compared on the voice parameters based on their phonation sample. The mean scores for fundamental frequency, maximum Fo, minimum Fo, absolute jitter, jitter percentage, absolute shimmer, shimmer percentage for all groups were calculated. Group 1 had a maximum and minimum Fo was 295.87 Hz, and 217.39 Hz respectively. Group 2 had a maximum and minimum Fo of 256.84 Hz and 192.05 Hz respectively. The maximum and minimum F0 for group 4 was 368.46 Hz and 223.75 Hz respectively. Frequency perturbation measures also showed variation among the four groups with group 1 (jitter percent of 1.44%) having near normal mean scores than the other groups. The comparison of voice characteristics among the groups suggest that cochlear implant recipients have comparable results to normal hearing group, followed by hearing aid users. Children using signed language, who do not use their auditory feedback loop has the lowest scores among all the groups on voice analysis. Conclusion: The study reiterates the benefits of using amplification devices CI in children. Early intervention for hearing impaired population is essential for normalising speech, language and voice in children. Key Words: Cochlear implant, hearing aids, sign language, multi-dimensional voice profile voice parameters.
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