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건청인과 감각신경성난청 성인의 청력역치에 따른 음량증가의 변화

A Changes of Loudness Growth as a Function of Hearing Threshold Level in Adults with Normal and Sensorineural Hearing Loss

이경원|박유진
한국청각언어재활학회 (Korean Academy of Audiology)|2013.06|Audiology and Speech Research|제9권 제1호|pp. 25-32

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키워드

감각신경성난청청력역치쾌적수준불쾌수준음량증가검사Sensorineural hearing loss (SNHL)Hearing threshold level(HTL)Most comfortable level(MCL)Uncomfortablelevel(UCL)Loudness growth test(LGT).

초록

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.

Abstract

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.

참고문헌 (20)

  1. 이경원, "보청기적합공식과 한국의 연구 고찰", 청능재활, 5(1), pp.6~12 (2009), 한국청각언어재활학회
  2. 이경원, "단측 보청기 착용 시 한국 SNHL 성인의 2-cc 커플러이득과 NAL-NL1의 비교", 청능재활, 4(1), pp.69~73 (2008)
  3. 이경원, "한국어음을 이용한 다화자잡음의 개발시안", 청능재활, 4(1), pp.24~27 (2008)
  4. 신은영, "정상 청력을 가진 한국성인의 음량증가의 특성", 청능재활, 4(1), pp.64~68 (2008)
  5. Allen, J. B., "Loudness growth to 1", 2-octave bands (LGOB) - Procedure for the assessment of loudness, 1990, pp.66, 745~753
  6. Beattie, R. C., "IHAFF loudness contour test: Reliability and effects of approach mode in normal-hearing subject", Journal of American Academy of Audiology, 8, pp.243~256 (1997)
  7. Byrne, D., "The National Acoustic Laboratories (NAL) new procedure for selecting the gain and frequency response of a hearing aid", Ear and Hearing, 7, pp.257~265 (1986)
  8. Byrne, D., "NAL-NL1 procedure for fitting non-linear hearing aids: Characteristics and comparisons with other procedures", Journal of the American Academy of Audiology, 12, pp.37~51 (2001)
  9. Cornelisse, L., "The input", output formula: A theoretical approach to the fitting of personal amplification devices, 1995, pp.97, 1854~1864
  10. Cox, R. M., "Using loudness data for hearing aid selection: The IHAFF approach", Hearing Journal, 48(2), pp.39~44 (1995)
  11. Cox, R. M., "The contour test of loudness perception", Ear and Hearing, 18, pp.388~400 (1997)
  12. Elberling, C., "Loudness scaling revised", Journal of the American Academy of Audiology, 10, pp.248~260 (1999)
  13. Keidser, G., "Comparing loudness normalization (IHAFF) with speech intelligibility maximization (NAL-NL1) when implemented in a two-channel device", Ear and Hearing, 22, pp.501~151 (2001)
  14. Lybarger, S. F., "U.S. Patent Application SN 543.278, In Hearing Aids", pp.236~ (2002), Thieme
  15. McCandless, G. A., "Prescription of gain", output (POGO) for hearing aids, 1983, pp.34(1), 16~21
  16. Punch, J., "Most Comfortable and uncomfortable loudness level : Six decades of research", American Journal of Audiology, 13, pp.144~157 (2004)
  17. Sammeth, C. A., "Variability of most comfortable and uncomfortable loudness level to speech stimuli in the hearing impaired", Ear and hearing, 10, pp.94~99 (1989)
  18. Schwartz, D., "Hearing aid selection for severe-to-profound hearing loss", The Hearing Journal, 41(2), pp.13~17 (1988)
  19. Ventry, I. M., "Evaluation of a clinical method for measuring comfortable loudness for speech", Journal of Speech and Hearing Disorder, 43, pp.149~159 (1978)
  20. Wall, L., "Test-retest reliability of a forced-choice procedure for determining most comfortable loudness level for speech", Ear and Hearing, 5, pp.118~122 (1984)

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