고막형 보청기의 길이에 따른 기능이득의 변화

Abstract

The purpose of this study is to investigate the functional gain difference between short and long canal CIC. The difference in canal length is about 2-4 mm. In comparison long canal CIC with short canal CIC, no increment occurs at 0.5 kHz and contribution at 1-4 kHz is approximately 1-3 dB increment due to deep insertion. But there are variable functional gain differences in every frequency. In the t-test, significant difference was found in only 1 kHz. As a result, long canal hearing aid is not absolutely effective in high frequency emphasis but tendency for high frequency emphasis. Their effects are different in every persons. Feedback problem occurred in 3 long canal cases and 1 short canal hearing aid. Among 18cases, 12 persons wear a long canal hearing aid 6 persons short canal hearing aid.