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논문 기본 정보

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학술저널
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한국청각언어재활학회 Audiology and Speech Research Audiology and Speech Research 제9권 제1호
발행연도
2013.1
수록면
25 - 32 (8page)

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The purpose of this study was to examine changes in the most comfortable level (MCL) and the uncomfortable level (UCL) depending on hearing threshold level (HTL) by investigating loudness growth among persons with normal hearing (NH) and sensorineural hearing loss (SNHL) at 500 Hz and 3,000 Hz. Based on the results, this study intended to provide useful data to calculate gain or frequency response curve and SSPL90 or OSPL90 of hearing aid that was used by Koreans with hearing loss. The NH group consisted of 17 persons (17 ears) in total who had the pure tone threshold average of 20 dB HL or less and who were 23-33 years old (average: 27.9 years, SD: 4.0 years). The SNHL group consisted of 117 persons (161 ears) in total who had the HTL of 40-75 dB HL at 500 Hz or 3,000 Hz and who were 19-78 years old (average: 55.1 years, SD: 15.4 years). As for presented tone, 5% frequency-modulated tone was used at 500 Hz and 3,000 Hz. Based on the results of study by Allen (1990), loudness category (LC) for loudness growth test was divided to 7 LCs before the HTL of 40-75 dB for NH and SNHL was divided by 5 dB interval at 500 Hz and 3,000 Hz. The results of this study were as follows. First, at 500 Hz and 3,000 Hz, the MCL of NH was 51.5 and 56.8 dB HL while the UCL was 88.5 dB HL and 88.7 dB HL. Consequently, the MCL at 3,000 Hz was found to be higher by 5.3 dB (p < .05). Second, the MCL and the UCL of SNHL persons increased as a function of the HTL. However, slope of regression equation was low in the order of the HTL, the MCL and the UCL. Therefore, it was confirmed that dynamic range became narrow according to increase in the HTL. Third, the MCL showed the higher correlation with the HTL than the UCL. This study was meaningful in that the study intended to measure loudness growth of Koreans with NH and SNHL. The results of this study are expected to have influences on development of hearing aid fitting formula for Koreans with hearing loss.
#감각신경성난청 #청력역치 #쾌적수준 #불쾌수준 #음량증가검사 #Sensorineural hearing loss #SNHL) #Hearing threshold level #HTL) #Most comfortable level #MCL) #Uncomfortablelevel #UCL) #Loudness growth test #LGT).

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참고문헌 (20)

참고문헌 신청
Allen, J. B. / 1990 / Loudness growth to 1/2-octave bands (LGOB) - Procedure for the assessment of loudness / Journal of the Acoustical Society of America 66 : 745 ~ 753 google schola Beattie, R. C. / 1997 / IHAFF loudness contour test: Reliability and effects of approach mode in normal-hearing subject / Journal of American Academy of Audiology 8 : 243 ~ 2 google schola Byrne, D. / 1986 / The National Acoustic Laboratories (NAL) new procedure for selecting the gain and frequency response of a hearing aid / Ear and Hearing 7 : 257 ~ 265 google schola Byrne, D. / 2001 / NAL-NL1 procedure for fitting non-linear hearing aids: Characteristics and comparisons with other procedures / Journal of the American Academy of Audiology google schola Cornelisse, L. / 1995 / The input/output formula: A theoretical approach to the fitting of personal amplification devices / Journal of the Acoustical Society of America 97 : google schola

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