보청기적합공식과 한국의 연구 고찰 = Review in Hearing Aid Prescription Methods and Its Considerations in Korean Studies

다국어 초록 (Multilingual Abstract)

In order to develop Korean hearing aid prescription method, this study examined features of gain, frequency response curves, saturation sound pressure level 90 (SSPL90), output sound pressure level 90 (OSPL90), compression threshold (CT), and compression ratio (CR), and attack time (AT)/release time (RT) of linear and non-linear hearing aids. Futhermore, Korean studies related to characteristics of physique, psychoacoustics, speech and language effects were summarized. Following review and summarization, several suggestions for Korean hearing aid prescription method were also presented. Results showed that there were some differences in gain and frequency response curves, SSPL90 or OSPL90 among each hearing aid prescription methods despite the similarity of race and languages. Several factors were considered for calculating CT, CR, AT and RT, dynamic range, speech audibility, signal-to-noise ratio and tonal quality. However there were no agreements on the calculation of those parameters because several preferred factors were not identical among hearing impaired people. Korean hearing aid prescription method is not developed yet. Currently when the hearing aids are imported, fitting softwares with hearing prescription methods come without consideration of differences
in acoustic characteristics of Korean language. In conclusion, we strongly suggest that various fundamental studies should be explored for the effective method for aural rehabilitation in Korean hearing impaired listeners.

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