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首页> 外文期刊>Journal of the Association for Research in Otolaryngology: JARO >Relative contributions of temporal envelope and fine structure cues to lexical tone recognition in hearing-impaired listeners.
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Relative contributions of temporal envelope and fine structure cues to lexical tone recognition in hearing-impaired listeners.

机译：时空包络和精细结构提示对听力受损的听众的语气识别的相对贡献。

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It has been reported that normal-hearing Chinese speakers base their lexical tone recognition on fine structure regardless of temporal envelope cues. However, a few psychoacoustic and perceptual studies have demonstrated that listeners with sensorineural hearing impairment may have an impaired ability to use fine structure information, whereas their ability to use temporal envelope information is close to normal. The purpose of this study is to investigate the relative contributions of temporal envelope and fine structure cues to lexical tone recognition in normal-hearing and hearing-impaired native Mandarin Chinese speakers. Twenty-two normal-hearing subjects and 31 subjects with various degrees of sensorineural hearing loss participated in the study. Sixteen sets of Mandarin monosyllables with four tone patterns for each were processed through a "chimeric synthesizer" in which temporal envelope from a monosyllabic word of one tone was paired with fine structure from the same monosyllable of other tones. The chimeric tokens were generated in the three channel conditions (4, 8, and 16 channels). Results showed that differences in tone responses among the three channel conditions were minor. On average, 90.9%, 70.9%, 57.5%, and 38.2% of tone responses were consistent with fine structure for normal-hearing, moderate, moderate to severe, and severely hearing-impaired groups respectively, whereas 6.8%, 21.1%, 31.4%, and 44.7% of tone responses were consistent with temporal envelope cues for the above-mentioned groups. Tone responses that were consistent neither with temporal envelope nor fine structure had averages of 2.3%, 8.0%, 11.1%, and 17.1% for the above-mentioned groups of subjects. Pure-tone average thresholds were negatively correlated with tone responses that were consistent with fine structure, but were positively correlated with tone responses that were based on the temporal envelope cues. Consistent with the idea that the spectral resolvability is responsible for fine structure coding, these results demonstrated that, as hearing loss becomes more severe, lexical tone recognition relies increasingly on temporal envelope rather than fine structure cues due to the widened auditory filters.
机译：据报道，听力正常的汉语说话者的语音音调识别基于精细的结构，而与时间包络提示无关。但是，一些心理声学和知觉研究表明，患有感觉神经性听力障碍的听众使用精细结构信息的能力可能会受损，而他们使用时态包络信息的能力却接近正常水平。这项研究的目的是调查在正常听觉和听觉受损的汉语普通话者中，时间包络和精细结构提示对词汇音调识别的相对贡献。 22名正常听力受试者和31名不同程度的感音神经性听力损失受试者参加了该研究。通过“嵌合合成器”处理每个具有四个音调模式的十六组普通话单音节，其中来自一个音调的单音节单词的时间包络与来自其他音调的相同单音节的精细结构配对。嵌合标记是在三个通道条件（4、8和16个通道）下生成的。结果表明，三个声道条件之间的音调响应差异很小。平均而言，正常听力组，中度组，中度至重度组和重度听力障碍组的音调反应分别与90.9％，70.9％，57.5％和38.2％的精细结构相符，而6.8％，21.1％，31.4和3.6％ ％和44.7％的语调响应与上述组的时间包络提示一致。对于上述对象组，与时间包络和精细结构均不相符的音调响应的平均值分别为2.3％，8.0％，11.1％和17.1％。纯音平均阈值与与精细结构一致的音调响应呈负相关，但与基于时间包络提示的音调响应呈正相关。与认为频谱可分辨性负责精细结构编码的想法一致，这些结果表明，随着听力损失变得更加严重，词汇音调识别越来越依赖于时间包络，而不是由于听觉滤波器的加宽而导致的精细结构提示。

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