한국어의 자모음비(CVR)에 따른 무의미음절의 단어인지도 변화
Effects of Word Recognition Score as a Function of Consonant-to-Vowel Ratio(CVR) in Korean Non-sense Syllables
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초록
Non-linear amplification may increase intensity of consonants through improvement of consonants-to-vowel ratio (CVR). In this study, we evaluated the effects of word recognition scores for nonsense consonant-vowel (CV) syllables as a function of CVR. Twenty adults (32 ears) with sensorineural hearing loss participated and five consonants (/s/, /tɕh/, /kh/, /th/, /ph/) and three vowels (/u/, /a/, /i/) were used in this study. CV syllables were recorded by male and female talkers and combined with speech noise at 5 different CVR (0, 3, 6, 9, 12 dB). Randomized list of 150 nonsense CV syllables was presented to the participants at the most comfortable level. As a results, no significant differences were observed between the male and the female talkers in nonsense syllables recognition at all CVR. However, results indicated that audibility of consonants improved when CVR increased up to 6 dB or more. Error analysis demonstrated that substitution errors were the most frequently made in word-initial position and vowels. These findings provide meaningful information about auditory rehabilitation for the Korean hearing impaired and also help audiologists to make an effective decision on the compression threshold, compression ratio, and attack and release time of non-linear hearing aids.
Abstract
Non-linear amplification may increase intensity of consonants through improvement of consonants-to-vowel ratio (CVR). In this study, we evaluated the effects of word recognition scores for nonsense consonant-vowel (CV) syllables as a function of CVR. Twenty adults (32 ears) with sensorineural hearing loss participated and five consonants (/s/, /tɕh/, /kh/, /th/, /ph/) and three vowels (/u/, /a/, /i/) were used in this study. CV syllables were recorded by male and female talkers and combined with speech noise at 5 different CVR (0, 3, 6, 9, 12 dB). Randomized list of 150 nonsense CV syllables was presented to the participants at the most comfortable level. As a results, no significant differences were observed between the male and the female talkers in nonsense syllables recognition at all CVR. However, results indicated that audibility of consonants improved when CVR increased up to 6 dB or more. Error analysis demonstrated that substitution errors were the most frequently made in word-initial position and vowels. These findings provide meaningful information about auditory rehabilitation for the Korean hearing impaired and also help audiologists to make an effective decision on the compression threshold, compression ratio, and attack and release time of non-linear hearing aids.
참고문헌 (16)
- 김진숙, "한국표준 일반용 단음절어표 개발", 청능재활, 4(2), pp.126~140 (2008)
- 노복임, "고주파수 및 수평형난청인의 무의미단음절의 인지와오류유형에 관한 연구", 석사, 청각학과, pp.2009
- 양병곤, "영어 CV음절의 음향적 특성 고찰", 음성과학, 13(4), pp.127~140 (2006), 한국음성학회
- 이경원, "한국어음을 이용한 다화자잡음의 개발 시안", 청능재활, 4(1), pp.24~27 (2008)
- 이주현, "한국어 음소의 주파수 특성에 관한연구", 청능재활, 1(1), pp.59~66 (2005)
- 조수진, "어음인지역치검사를 위한 한국표준 일반용 이음절어표 개발", 청능재활, 4(1), pp.28~36 (2008)
- Byrne D, "An international comparison of long term average spectra", J Acoust Soc Am, 96(4), pp.2108~2120 (1994)
- Danaher ES, "Some masking effects produced by low frequency vowel formants in persons with sensorineural loss", J Speech Lang Hear R, 17, pp.324~338 (1975)
- Danaher ES, "Backward and forward masking in listeners with severe sensorineural hearing loss", J Speech Lang Hear R, 17, pp.324~338 (1978)
- Hickson L, "Consonant perception in quiet: effect of increasing the consonant-vowel ratio with compression amplification", J Am Acad Auiol, 8(5), pp.322~332 (1997)
- Hygge S, "Normal hearing and hearing- impaired subjects’ ability to just follow conversation in competing speech, and noise backgrounds", J Speech Lang Hear R., 5, pp.208~215 (1992)
- Kennedy E, "Consonant-vowel intensity ratios for maximizing consonant recognition by hearing-impaired listeners", J Acoust Soc Am, 104(4), pp.1098~1114 (1998)
- Martin ES, "Sensorineural hearing loss and upward spread of masking", J Speech Lang Hear R, 13, pp.426~437 (1970)
- Peters RW, "Speech reception thresholds in noise with and without spectral and temporal dips for hearing impaired and normally hearing people", J Acoust Soc Am, 103(1), pp.577~587 (1998)
- Sammeth CA, "The role of consonant-vowel amplitude ratio in the recognition of voiceless stop consonants by listeners with hearing impairment", J Speech Lang Hear R, 42, pp.42~55 (1999)
- Zwicker E, "Temporal resolution in hard-of-hearing patients", Audiology, 21, pp.474~494 (1982)