난청인의 주파수 선택도를 고려한 난청 시뮬레이터 개발
Development of a Hearing Impairment Simulator considering Frequency Selectivity of the Hearing Impaired
1
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
In this paper, we propose a hearing impairment simulator considering reduced frequency selectivity of the hearing impaired, and verify it's performance through experiments. The reduced frequency selectivity was embodied by spectral smearing using linear prediction coding(LPC). The experiments are composed of 4 kinds of tests; pure tone test, speech reception threshold(SRT) test, and word recognition score(WRS) test without spectral smearing and with spectral smearing. The experiments of the hearing impairment simulator were performed with 9 subjects who have normal hearing. The amount of spectral smearing was controlled by LPC order. The percentile score of WRS test without smearing is 89.78±2.420%. The scores of WRS with 24th LPC order and with 8th LPC order are 88.00±3.556% and 83.78±2.123% respectively. It is verified that WRS score is lowered by decreasing LPC order. This is a reasonable result considering that spectral smearing is getting heavier according to decreasing LPC order. It is confirmed that spectral smearing using LPC simulates the reduced frequency selectivity of the hearing impaired and affects the clearness of speech reception.
Abstract
In this paper, we propose a hearing impairment simulator considering reduced frequency selectivity of the hearing impaired, and verify it's performance through experiments. The reduced frequency selectivity was embodied by spectral smearing using linear prediction coding(LPC). The experiments are composed of 4 kinds of tests; pure tone test, speech reception threshold(SRT) test, and word recognition score(WRS) test without spectral smearing and with spectral smearing. The experiments of the hearing impairment simulator were performed with 9 subjects who have normal hearing. The amount of spectral smearing was controlled by LPC order. The percentile score of WRS test without smearing is 89.78±2.420%. The scores of WRS with 24th LPC order and with 8th LPC order are 88.00±3.556% and 83.78±2.123% respectively. It is verified that WRS score is lowered by decreasing LPC order. This is a reasonable result considering that spectral smearing is getting heavier according to decreasing LPC order. It is confirmed that spectral smearing using LPC simulates the reduced frequency selectivity of the hearing impaired and affects the clearness of speech reception.
참고문헌 (11)
- Thomas Baer, "Effects of spectral smearing on the intelligibility of sentences in noise", J. Acoust. Soc. Am, 94(3), pp.1229~1241 (1993)
- Moore, Brian, "Simulation of the effects of loudness recruitment and threshold elevation on the intelligibility of speech in quiet and in background of speech", J. Acoust. Soc. Am, 94(4), pp.2050~2062 (1993)
- Moore BCJ, "Factors influencing loudness perception in people with cochlear hearing loss" (1996), Speech and Hearing Aids
- Moore BCJ, "Detection of frequency modulation by hearing-impaired listeners: Effects of carrier frequency, modulation rate, and added amplitude modulation", J. Acoust. Soc. Am, 111, pp.327~335 (2002)
- Moore, BCJ, "Glasberg B, R. “Suggested formulae for calculating auditory filter Bandwidth and excitation patterns", J . Acoust. Soc. Am, 74, pp.750~753 (1983)
- DM Chabries, "Application of a human auditory model to loudness perception and hearing compensation", Proc. IEEE ICASSP, pp.3527~3530 (1995)
- Moore, BCJ, "Comparisons of frequency selectivity in simultaneous and forward masking for subjects with unilateral cochlear impairments", J. Acoust. Soc. Am, 80, pp.93~107 (1986)
- Glasberg BR, "Auditory filter shapes in subjects with unilateral and bilateral cochlear impairments", J Acoust. Soc. Am, 79, pp.1020~1033 (1986)
- Qian-Jie Fu, "Perceptual Learning and Auditory Training in Cochlear Implant Recipients", Trends in Amplification, 11(3), pp.193~205 (2007)
- Seungduck Hur, "Audiology 3rd Edition" (2004), Dong-ah University Press
- Quackenbush SR, "Objective Measures of Speech Quality", pp.47~51 (1988), Prentice-Hall