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KMID : 0858620050090010023
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Korean Journal of Audiology
2005 Volume.9 No. 1 p.23 ~ p.28
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Comparison of the Functional Gain Differences in CIC by Canal Length
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Suh Ok-Ki
Shin Joong-Wook
Lee Ho-Ki
Chung Myung-Hyun
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Abstract
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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.
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KEYWORD
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Hearing aids, Ear canal, Hearing rehabilitation
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