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Audiology and Speech Research > Volume 13(3); 2017 > Article
Audiology and Speech Research 2017;13(3): 216-221.
Published online: July 31, 2017.
doi: http://dx.doi.org/10.21848/asr.2017.13.3.216
한국어의 음향 특성을 고려한 보청기 처방법과 기존 처방법의 비교
진인기1, 이경원2, 김진숙1, 김동욱3, 손준일3, 이정학2
1한림대학교 자연과학대학 언어청각학부·청각언어연구소
2한림국제대학원대학교 청각학과
3삼성종합기술원 미래IT연구센터
Comparison of a Hearing Aid Fitting Formula Based on Korean Acoustic Characteristics and Existing Fitting Formulae
In-Ki Jin1, Kyoungwon Lee2, Jinsook Kim1, Dongwook Kim3, Junil Sohn3, Junghak Lee2
1Division of Speech Pathology and Audiology, Research Institute of Audiology and Speech Pathology, College of Natural Sciences, Hallym University, Chuncheon, Korea
2Department of Audiology, Hallym University of Graduate Studies, Seoul, Korea
3Future IT Research Center, Samsung Advanced Institute of Technology, Yongin, Korea
Correspondence  Junghak Lee ,Tel: +82-2-2051-4950, Fax: +82-2-3453-6618, Email: leejh@hallym.ac.kr
  Published online: July 31, 2017.
Most existing hearing aid (HA) fitting formulae were developed based on English. However, Korean language has different acoustic characteristics compared to English. This study aimed to develop Korean language-specific hearing aid fitting formula (Hallym Audiology Institute-version 1, HAI-v1) and to compare speech perception, clarity, and overall preference between the HAI-v1 and established fitting formulae [National Acoustic Laboratories’ nonlinear fitting procedure, version 2 (NAL-NL2) and Desired Sensation Level, version 5.0 (DSL5.0)].
Gains for the HAI-v1 were determined to reach the gain around the medium to the two-thirds portion in the dynamic range of conversational speech level for soft, medium, and loud levels using loudness growth for Koreans who have sensorineural hearing loss (SNHL). Twenty-four people with SNHL participated in this study. Reception thresholds of sentences (RTSs) and preferences (clarity and overall preference) were evaluated, once with HAI-v1 setting, once with NAL-NL2 setting, and once with DSL5.0 setting, in random order. Then, results of RTSs and preferences across HA fitting formulae were compared.
There were no statistical differences for RTSs with and without noise in all HA fitting formulae. For clarity, more participants preferred sounds with HAI-v1 or NAL-NL2 than sounds with DSL5.0. For overall preference, more participants preferred sounds with HAI-v1 than sounds with NAL-NL2 or DSL5.0.
Results of this study suggest that language-specific HA fitting formula may provide better HA outcomes for people who use different languages.
Key Words: Hearing aid fitting formula, Hallym Audiology Institute-version 1, Speech perception, Quality judgment
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