디지털 음성변환이 청각장애아동의 어음변별력 향상에 미치는 효과
The Effectiveness on Speech Discrimination Ability for the Hearing Impaired with Digital Speech Transformation
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초록
》최근에 청각장애아동의 어음변별력 향상을 위한 공학적 접근에 관한 연구가 활발하게 진행되고 있다. 본 연구에서는 청각장애아동 30명을 대상으로 12dB 증폭된 원음, 2000Hz 이상의 주파수에서 12dB 증폭한 음, 그리고 표적음의 모든 주파수에서 12dB 증폭하여 단음절과 어음변별력 등의 차이를 비교하였다. 2000Hz 이상에서 증폭된 음성신호 환경에서 청각장애아동은 단음절과 어휘를 인지하는데 가장 탁월한 효과가 나타났다. 본 연구에서는 청각장애아동의 어음변별력 향상을 위한 공학적 접근의 필요성을 시사하였다.
Abstract
Advances in hearing aid technology are increasing greatly the sophistication of hearing aids and of techniques for accurate measurement. However, although the development of hearing aid technology, the speech discrimination ability for hearing impaired is lagged far behind to understand in education situation. The purpose of this study was to illustrate the effectiveness of the speech discrimination according to three different electroacoustic inputs which are equal 12dB amplification in all speech words including consonant and vowel, 12dB amplification in above 2000Hz frequencies, and 12dB amplification in target noun. The three different speech words which were input are one syllable consonant itself, and two different or same consonants, and one and two syllable vocabularies. Thirty hearing impaired who were in the degree of severe hearing loss with sensorineural hearing loss were participated for this study. The results of this study were that the 12dB amplification in 2000Hz was most effective in three different speech words discrimination than those of the two different electroacoustic situations. Therefore, this study suggested that the method of 12dB amplification above 2000Hz is most effective to teach speech discrimination abilities for hearing impaired.