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Abstract
The ability of native Mandarin-speaking, hearing-impaired subjects to detect Mandarin tones was assessed in this study. Nine subjects with mild sensorineural hearing loss (SNHL) and nine subjects with moderate SNHL participated in the study. Nine normal subjects served as control. All subjects received a tone detection test and Chinese word recognition test. The results show that tone detection was only minimally impaired in the mild SNHL group if audibility of the stimulus is well compensated for. In the moderate SNHL group, the mean score was significantly lower, but the difference was small. This suggests that tone detection is only slightly impaired for subjects with moderate hearing loss. For each individual tone, the mean scores for tones 2 and 3 were lowest and most easily confused by all normal and hearing-impaired subjects. No significant correlation was found between the tone detection score and word recognition score for all subjects. The relatively preserved ability to perceive tones in mild and moderate SNHL subjects may be helpful in their speech recognition.
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