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KMID : 1039520160200020080
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Journal of Audiology & Otology
2016 Volume.20 No. 2 p.80 ~ p.84
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The Band-Importance Function for the Korean Standard Sentence Lists for Adults
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Jin In-Ki
Lee Jung-Hak
Lee Kyoung-Won
Kim Jin-Sook
Kim Dong-Wook
Sohn Jun-il
Lee Kyung-Ju
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Abstract
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Background and Objectives: The band-importance function (BIF) refers to a value characterizing the relative importance of different frequencies to speech intelligibility. The purpose of this study was to derive the BIF for the Korean standard sentence lists for adults (KS-SL-A).
Subjects and Methods: In this study, sentences from the KS-SL-A were used as the speech material. Twenty-six normal-hearing Korean listeners participated and intelligibility scores in 8 filters with 3 signal-to-noise ratio conditions were obtained. Based on the intelligibility score percentages, the BIF for the KS-SL-A was derived by using an established protocol.
Results: Band-importance weights varied across frequency bands. The most important frequency region was around 316 Hz (20.0%), and the importance of the frequency bands below the center frequency (CF) of 1,778 Hz was 59.6%. Therefore, low frequencies below the CF of 1,778 Hz were more important than high frequencies above the CF of 1,778 Hz.
Conclusions: The BIF for KS-SL-A could be applied towards developing a hearing aid fitting formulae for Korean listeners.
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KEYWORD
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Band-importance function, Speech intelligibility, Hearing aid fitting
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