碩士 / 國立臺北護理健康大學 / 聽語障礙科學研究所 / 103 / The goal of this study was to investigate benefits between activation and deactivation of NFC in adults with hearing loss, and possible relationship between benefits and acclimatization. In the study, participants wore experimental hearing aids, Unitron, Max 20 FlexTrial. Benefits of nonlinear compression hearing aids were evaluated in 11 adult participants with hearing loss ranged from moderate to profound. Among these participants, seven of 11 wore study hearing aids with acclimatization in two month testing period, and four completed all testing in one day. Each participant completed all three outcome measures. For the first measure, participants wore their own hearing aids for familiarization of testing procedure. For the second and the third outcome measures, participants wore experimental hearing aids with NFC on and off completed objective and subjective assessment. Objective assessment included aided threshold in soundfield, Mandarin monosyllable recognition test (MMRT), and Mandarin Hearing in Noise Test for Taiwan (MHINT-T). Subjective assessments included sound quality inventory and International Outcome inventory for hearing aids (IOIHA).
Results from objective outcome measures showed that aided threshold for 6000 and 8000 Hz in soundfield were statistically better with NFC on regardless of acclimatization. Monosyllabe word, consonant recognition and tone recognition
scores showed no statistical difference. In an analysis of consonant confusions, stimuli and responses were tabulated on confusion matrix. Findings from participants with acclimatization may support the increase number of some consonant confusions with NFC on. Moreover, tone recognition score showed improvement in participants with acclimatization, but not in participants without acclimatization. It was suggested that the activation of NFC may be beneficial for participants in improving tone perception with acclimatization. Results from quiet condition of Mandarin hearing in noise test showed that participants may achieve better sentence recognition response with the activation of NFC regardless of acclimatization. However, the above observation was not found in noise condition. Results from subjective outcome showed that no statistical difference between NFC on and off in participants with or without acclimatization. It was concluded that adults with hearing loss may exhibit improvement of high frequency audibility from NFC. However, the benefit in monosyllable word, consonant recognition, and perceptual benefit may be limited. Tone recognition may improve with acclimatization.
| Identifer | oai:union.ndltd.org:TW/103NTCN0714016 |
| Date | January 2015 |
| Creators | Yu-Sheng Chou, 周育聖 |
| Contributors | Edward Yih- Liang Yang, 楊義良 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 108 |
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