보청기 착용아와 인공와우 착용아의 어음 변별 특성 = A Study on Speech Discrimination Ability between the Hearing Impaired Children with Hearing Aids and Cochlear Implants

다국어 초록 (Multilingual Abstract)

The purpose of this study was to compare the speech discrimination abilities between two groups such as the hearing impaired children with hearing aids and cochlear implants. Total four-to-eight years old thirty hearing impaired children, fifteen children with hearing aids and fifteen children with cochlear implants, participated for this study. The subjects are prelingually hearing impaired and have no problem without hearing loss itself. The test of speech discrimination for this study is conducted in a hearing testing room where was sound proofed and the value of inner noise was less than 30dB SPL. The tools for the test of speech discrimination are 5 sounds(/a/, /u/, /i/ , /s/) and 25 words with primary or secondary stressed syllable. The results of this study are as followings: First, in 5 sounds test, it shows that the average was 4.33 and the standard deviation was .72 for children using hearing aids. While, for children with cochlear implants, it shows that the average was 4.80 and the standard deviation was .41. It indicates that there was the significant differences statistically in the responsive sampling t-test of two groups. In the case of children using hearing aids, it indicates that error was not found in /a/ but i1: was found to only one child in /?/, two children in /u/, three children in /i/ and four children in /s/ among them, while, in the case of children with cochlear implants, it is not found in the sounds of /a/, /i/, /?/ but it founds as error with one child in /u/ and two children in /s/. Therefore, both groups all showed that the discrimination ability of /s/ is the lowest scores. Second, children using hearing aids show in discrimination words with primary or secondary stressed syllable that the average was 75.47 and the standard deviation was 13.51. However, the children with cochlear implants showed that each of them was 77.33 and 14.16. Even though the mean scores between the two groups are different, there was no significant differences statistically in the t-test. The group using hearing aids showed that the percentage of error is 26.67 % in voiceless sounds and 22.22% in voice sounds. In a way of articulation, it is 27.33% in fricatives, 27.33% in plosives, 25.67% in nasals and 17.78% in affricates. Consequently, it indicates that the percentage of error was the highest in fricatives and postives, but the lowest in affricates. White the group with cochlear implants shows that the percentage of error is 24.15% in voiceless sounds and 18.89% in voice sounds. In a way of articulation, it shows that it is 28.34% in fricatives, 26.34% in plosives, 25% in nasals, and 12.23% in affricates. The result of error analysis indicats that the percentage of errors between two groups was 0% in vowels and it was higher in voiceless sounds than in voice sounds. In a way of articulation, both groups showed that discrimination error was the highest in fricatives and plosives but it was the lowest in affricates.

목차 (Table of Contents)

• Abstract
• Ⅰ. 서론
• Ⅱ. 이론적 배경
• Ⅲ. 연구 방법
• Ⅳ. 결과 및 논의
• Ⅴ. 결론 및 제언
• 참고문헌
• 부록