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RISS 인기검색어
- 검색키워드
- 저자 : Jont B. Allen (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
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A Relationship of Tone, Consonant, and Speech Perception in Audiological Diagnosis
Han, Woo-Jae,Allen, Jont B. The Acoustical Society of Korea 2012 韓國音響學會誌 Vol.31 No.5
This study was designed to examine the phoneme recognition errors of hearing-impaired (HI) listeners on a consonant-by-consonant basis, to show (1) how each HI ear perceives individual consonants differently and (2) how standard clinical measurements (i.e., using a tone and word) fail to predict these differences. Sixteen English consonant-vowel (CV) syllables of six signal-to-noise ratios in speech-weighted noise were presented at the most comfortable level for ears with mild-to-moderate sensorineural hearing loss. The findings were as follows: (1) individual HI listeners with a symmetrical pure-tone threshold showed different consonant-loss profiles (CLPs) (i.e., over a set of the 16 English consonants, the likelihood of misperceiving each consonant) in right and left ears. (2) A similar result was found across subjects. Paired ears of different HI individuals with identical pure-tone threshold presented different CLPs in one ear to the other. (3) Paired HI ears having the same averaged consonant score demonstrated completely different CLPs. We conclude that the standard clinical measurements are limited in their ability to predict the extent to which speech perception is degraded in HI ears, and thus they are a necessary, but not a sufficient measurement for HI speech perception. This suggests that the CV measurement would be a useful clinical tool.
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Comparisons in Consonant Confusions with and without gain for the Hearing-Impaired Listeners
Yang-soo Yoon,David M. Gooler,Jont B. Allen,Jae-sook Gho 한국언어재활사협회 2017 Clinical Archives of Communication Disorders Vol.2 No.1
Purpose: The present study aimed determining the effect of audibility on a consonant-by-consonant perception and on perceptual confusions per hearing-impaired (HI) listener. Methods: Six participants with sensorineural hearing loss participated. Sixteen consonant-vowel (CV) syllables with the common vowel /a/ were presented as a function of signal-to-noise ratio. Gains were computed with subject’s hearing thresholds by using National Acoustics’ Laboratory - Revised Compensation Rule. Then the gains were applied to each of the 16 CV syllables. Consonant confusions were measured without and with gain. Results: We identified three levels of difficulty in CV perception regardless of applying gain: Easy- /ga/, /ka/, /ma/, /na/, /pa/, /∫a/; Moderate - /da/, /fa/, /sa/, /ta/, /ʒa/, /za/; Difficult- /ba/, /va/, /δa/, and /θa/. Enhanced audibility improved performance most for Moderate set and little for the Easy set, but created negative effect on performance for the Difficult set. The effect of gain is also listener-specific: three out of the six listeners received benefit while other three listeners experienced negative effect from CVs with gain. The confusion analysis showed that subjects who benefited had the same primary competitors between gain and no-gain conditions, while subjects who did not benefit had additional competitors with gain. Conclusions: The preliminary results of this study indicate that audibility is one of the primary factors influencing speech recognition of HI listeners, but reduced audibility alone cannot explain the difficulty of HI listeners to understand speech-in-noise. A more affirmative conclusions can be made with further analyzing data from larger sample size.
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