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Audiol > Volume 4(2); 2008 > Article
Audiology 2008;4(2): 199-203.
Published online: December 31, 2008.
doi: http://dx.doi.org/10.21848/audiol.2008.4.2.199
비프로그램식 보청기에서 압축역치의 조절을 통한 배경소음의 감소에 대한 사례보고
이상연
벨톤히어링
Case Report for Background Noise Reduction by Compression Threshold(CT) Control in Non-Programmable Hearing Aids
Sang Yeon Lee
Belltone Hearing, Seoul, Korea
Correspondence  Sang Yeon Lee ,Tel: (02) 2015-0479, Fax: (02) 501-1909, Email: syleesms@hanmail.net
Received: October 16, 2008;  Accepted: November 25, 2008.  Published online: December 31, 2008.
ABSTRACT
Most commercial companies currently produced non-programmable digital hearing aids. The key feature of this hearing aids was adopting the WDRC amplification method in ITE (in-the-ear) type hearing aids. They were equipped with the 2-3 trimmers and could be controlled for gain levels, frequency response curves, or OSPL90 properties. The price of the non-programmable hearing aid was relatively lower than programmable ones while the noise reduction and acoustic feedback detection/control were limited in non-programmable ones. This report was for the cases where background noise and internal noise were decreased with compression thresholds in non-programmable digital hearing aids without noise reduction algorithms or expansion functions, which were commonly built in programmable digital hearing aids.
Key Words: Compression threshold (CT)·Background noise·Non-programmable hearing aid·Digital hearing aid.
중심단어: 압축역치· 배경소음· 비프로그램보청기· 디지털보청기.
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