Selective Word Stress Effect for Speech Perception Enhancement in Hearing-Impaired Older Listeners
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초록
Purpose: Although it is known that communication problem of the older adults might be overcome by using slower speech or talking in a less noisy environment, there is still a lack of detailed skills. This study aimed to identify word stress benefit in speech perception for older listeners when different levels of background noise and speech rate were presented. Methods: Forty elderly (20 for hearing loss and 20 for normal hearing) were randomly recruited. Both groups conducted sentence tests at quiet and three signal-to-noise ratio (SNR) (+6, +3, 0 dB) and did them under four timealteration conditions (± 30% and ± 15%). Further, all sentences of both the noise and time alteration conditions had a 4, 6, or 8 dB up emphasized key word. Results: As expected, the hearing-impaired group had lower scores than the group with normal hearing in quiet and three SNR conditions. In quiet, both groups performed best at 6 dB emphasis. However, there was no significant difference in performance across 4, 6, and 8 dB up stress conditions when background noise was present. As time compression increased, speech perception scores decreased in both groups. Notably, at 30% expansion (slower speed), the normal hearing group scored the highest at 4 dB up emphasis, while the hearing-impaired group showed the best performance best at 8 dB up emphasis. Conclusion: Based on the current results, rather than simply speaking slowly, it would be more helpful for older adults with hearing loss to control their speech rate also emphasize key words during the conversation.
Abstract
Purpose: Although it is known that communication problem of the older adults might be overcome by using slower speech or talking in a less noisy environment, there is still a lack of detailed skills. This study aimed to identify word stress benefit in speech perception for older listeners when different levels of background noise and speech rate were presented. Methods: Forty elderly (20 for hearing loss and 20 for normal hearing) were randomly recruited. Both groups conducted sentence tests at quiet and three signal-to-noise ratio (SNR) (+6, +3, 0 dB) and did them under four timealteration conditions (± 30% and ± 15%). Further, all sentences of both the noise and time alteration conditions had a 4, 6, or 8 dB up emphasized key word. Results: As expected, the hearing-impaired group had lower scores than the group with normal hearing in quiet and three SNR conditions. In quiet, both groups performed best at 6 dB emphasis. However, there was no significant difference in performance across 4, 6, and 8 dB up stress conditions when background noise was present. As time compression increased, speech perception scores decreased in both groups. Notably, at 30% expansion (slower speed), the normal hearing group scored the highest at 4 dB up emphasis, while the hearing-impaired group showed the best performance best at 8 dB up emphasis. Conclusion: Based on the current results, rather than simply speaking slowly, it would be more helpful for older adults with hearing loss to control their speech rate also emphasize key words during the conversation.
참고문헌 (12)
- Barac-Cikoja, D., "Effect of sentential context on syllabic stress perception by hearing-impaired listeners", Proceeding of Fourth International Conference on Spoken Language Processing, 1, pp.173~175 (1996)
- Cho, S., "Speech perception in older listeners with normal hearing : Conditions of time alteration, selective word stress, and length of sentences", Korean Journal of Audiology, 18(1), pp.28~33 (2014)
- Doherty, K. A., "The benefit of amplification on auditory working memory function in middle-aged and youngolder hearing impaired adults", Frontiers in Psychology, 6, pp.721~ (2015)
- Gates, G. A., "Presbycusis", The Lancet, 366(9491), pp.1111~1120 (2005)
- Gordon-Salant, S., "Recognition of time-compressed and natural speech with selective temporal enhancements by young and elderly listeners", Journal of Speech, Language, and Hearing Research, 50(5), pp.1181~1193 (2007)
- Han, W., "Perception of time-altered sentences and selective word stress by normal-hearing listeners", The Journal of the Acoustical Society of Korea, 32(5), pp.430~437 (2013)
- Joo, Y., "Effects of frequency range and degree of hearing loss on word recognition in elderly listeners", Audiology and Speech Research, 5(1), pp.36~41 (2009)
- Kim, J. S., "Development of a test of Korean speech intelligibility in noise(KSPIN)using sentence materials with controlled word predictability", Speech Sciences, 7(2), pp.37~50 (2000)
- Manan, H. A., "Age-related laterality shifts in auditory and attention networks with normal ageing: Effects on a working memory task", Neurology, Psychiatry and Brain Research, 19(4), pp.180~191 (2013)
- Ouda, L., "Age-related changes in the central auditory system", Cell and Tissue Research, 361, pp.337~358 (2015)
- Pichora-Fuller, M. K., "How young and old adults listen to and remember speech in noise", The Journal of the Acoustical Society of America, 97(1), pp.593~608 (1995)
- Vaughan, N. E., "Time-expanded speech and speech recognition in older adults", Journal of Rehabilitation Research and Development, 39(5), pp.559~565 (2002)