음성 명료도 강화를 위한 한국형 Fitting Formula 연구

초록

In this study, K-formula which based on NAL-NL1 (NAL-nonlinear, version 1) was suggested for maximization speech intelligibility. K-formula was considered the long-term average speech spectrum of Korean instead of English and BIF(Band Importance Factor) since the frequency characteristic of Korean is different from English. New insertion gains of K-formula were derived using the SII (speech intelligibility index) program provided by ANSI (American National Standards Institute). In order to verify effect of new fitting gain, we compared K-formula with NAL-NL1 from word recognition score (WRS). In the WRS, a word set as test material consist of 50 1-syllable word and four of sentence files generally used in hearing clinic. As a result of experiment the WRS of K-formula was better than NAL-NL1.