Evaluation of Speech Perception Abilities in Children with Cochlear Implants / 대한이비인후과학회지

BACKGROUND AND OBJECTIVES: Assessments of cochlear implants in children are an essential part of the paediatric cochlear implant program, because it is important to describe benefits of cochlear implants in children in terms of speech perception skills. The purpose of this study was to examine speech perception abilities of children with cochlear implants on a battery of speech perception tests assigned according to categories of speech perception skills. MATERIALS AND METHODS: Thirteen children with prelingual onsets of deafness were evaluated with a battery of speech perception tests with audition alone at preimplantation and 6 month intervals from initial stimulation. The children ranged in age from 2 years 9 months to 10 years 11 months. Speech perception test scores were tabulated and each child was placed into one of speech perception categories. The speech perception categories consisted of ten levels from poor detection of speech sound (0) to very good open-set speech recognition (9). RESULTS: All children demonstrated better speech perception skills with cochlear implants than they had with hearing aids before implantation. Five of them showed some open-set speech perception at 6 months of implant use. CONCLUSION: The performance of children improved with experience of the implant. The speech perception categories were useful for comparing the children and designing training objectives and tasks.

Speech Perception Abilities over Time in Children with a Cochlear Implant on Vowel and Consonant Imitation Test / 대한이비인후과학회지

BACKGROUND: As the population of children received a cochlear implant at an early age is increasing, there is a need to test speech perception ability for the young children. OBJECTIVES: The purpose of this study is to evaluate speech perception ability for young children using a cochlear implant with Vowel and Consonant Imitation test. MATERIAL AND METHODS: Subjects were nine children with prelingual deafness who had at least 6 months of experience with Nucleus 22-channel cochlear implant. The age at implantation ranged from 3 years and 5 months to 10 years and 11 months. A 14-set vowel imitation test in a "hVd" environment and a 18-set consonant imitation test in a "aCa" environment(Vowel and Consonant Imitation test) and Peabody Picture Vocabulary Test(PPVT) were administered with audition alone at 6 month intervals from initial stimulation. RESULTS: Six out of 9 children performed above chance on the Vowel and Consonant Imitation test at 6 months from initial stimulation. The average scores for vowel and consonant were 34%(range: 0-79) and 22%(range: 0-47) correct, respectively. Generally, the Vowel and Consonant Imitation test scores and PPVT equivalent ages were increased over time. CONCLUSION: The Vowel and Consonant Imitation test appears to be a useful tool for assessment of speech perception ability of young children with a cochlear implant.

A Survey on the Hearing Disturbance of High School Students in Korea / 예방의학회지

As a link of chain study program of school health, a survey was made up by the screening test with audiometry for hearing disturbance on 18,675 high school students who are mainly aged in 15-19 years from November 5.1969 to October 30. 1970. The results obtained were summarized as follows. According to our criteria as table 3, the rates of the profound , the severe and the moderate who required the appropriate hearing aids were 0.02%, 0.03% and 0.14% respectively : the cumulative percentage was 0.197. When the marginal, 0.23% should be included the cumulative rate was 0.41%. But there was no significance by sex and school classes. If we will make the special classes for them one class would be estimated out of 10,000 persons when a class is formed with about 15 persons. Otherwise when we examined that according to each ear of persons, the rates of the profound, the severe and the moderate were 0.17%, 0.22% and 0.33% respectively and their cumulative perventage was 0.72. There was no significance also by sex and age. By the way, the rate of hearing disturbance in urban high school students tended to lower than rural. And the perceptive disturbance was higher than rural in rate. The conductive disturbance tended to oppose in comparison with the above.

A Survey on the Hearing Disturbance of High School Students in Korea / 예방의학회지

As a link of chain study program of school health, a survey was made up by the screening test with audiometry for hearing disturbance on 18,675 high school students who are mainly aged in 15-19 years from November 5.1969 to October 30. 1970. The results obtained were summarized as follows. According to our criteria as table 3, the rates of the profound , the severe and the moderate who required the appropriate hearing aids were 0.02%, 0.03% and 0.14% respectively : the cumulative percentage was 0.197. When the marginal, 0.23% should be included the cumulative rate was 0.41%. But there was no significance by sex and school classes. If we will make the special classes for them one class would be estimated out of 10,000 persons when a class is formed with about 15 persons. Otherwise when we examined that according to each ear of persons, the rates of the profound, the severe and the moderate were 0.17%, 0.22% and 0.33% respectively and their cumulative perventage was 0.72. There was no significance also by sex and age. By the way, the rate of hearing disturbance in urban high school students tended to lower than rural. And the perceptive disturbance was higher than rural in rate. The conductive disturbance tended to oppose in comparison with the above.