Effects of cooperating and conflicting cues on speech intonation recognition by cochlear implant users and normal hearing listeners.
Effects of cooperating and conflicting cues on speech intonation recognition by cochlear implant users and normal hearing listeners.
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DOI：
10.1159/000212112
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发表时间：
2009
影响因子：
1.6
通讯作者：
Chatterjee M
中科院分区：
文献类型：
--
作者：
Peng SC;Lu N;Chatterjee M
耳蜗植入（CI）受体只能有限地获得基频（F0）信息，因此在语音语调识别方面表现出缺陷。对于语音语调，F0用作主要线索，并且其他潜在的声学线索（例如，强度特性）也可能有贡献。本研究探讨了声音线索的合作或冲突的语音语调识别成人人工耳蜗（CI），正常听力（NH）的听众与全频谱和频谱退化的语音刺激的影响。识别语音语调，这意味着问题和声明的对比进行了测量，在13个CI收件人和4 NH听众，使用重新合成的双音节词，F0和强度属性进行了系统的操作。刺激集由其声学线索，即，F0轮廓和强度模式，要么合作或冲突。受试者确定，如果每个刺激是一个“声明”或“问题”在一个单一的时间间隔，两个选择强迫选择（2AFC）的范例。Logistic模型拟合的数据，估计系数进行了比较合作和冲突的条件下，受试者群体之间（CI与NH），并在全频谱和频谱退化的条件下NH听众。结果表明，F0轮廓线索和强度线索的协同作用能促进CI听者的语调识别，而F0轮廓线索和强度线索的冲突则会对CI听者的语调识别产生不利影响。另一方面，在全频谱刺激下，NH受试者的语调识别不受线索合作或冲突的影响。合作或冲突的线索的影响之间的CI组和NH听众与频谱退化的刺激。这些发现表明，在CI患者的听力康复中考虑多声源语音识别的重要性。
Cochlear implant (CI) recipients have only limited access to fundamental frequency (F0) information, and thus exhibit deficits in speech intonation recognition. For speech intonation, F0 serves as the primary cue, and other potential acoustic cues (e.g., intensity properties) may also contribute. This study examined the effects of acoustic cues being cooperating or conflicting on speech intonation recognition by adult cochlear implant (CI), and normal-hearing (NH) listeners with full-spectrum and spectrally degraded speech stimuli. Identification of speech intonation that signifies question and statement contrasts was measured in 13 CI recipients and 4 NH listeners, using resynthesized bi-syllabic words, where F0 and intensity properties were systematically manipulated. The stimulus set was comprised of tokens whose acoustic cues, i.e., F0 contour and intensity patterns, were either cooperating or conflicting. Subjects identified if each stimulus is a “statement” or a “question” in a single-interval, two-alternative forced-choice (2AFC) paradigm. Logistic models were fitted to the data, and estimated coefficients were compared under cooperating and conflicting conditions, between the subject groups (CI vs. NH), and under full-spectrum and spectrally degraded conditions for NH listeners. The results indicated that CI listeners’ intonation recognition was enhanced by F0 contour and intensity cues being cooperating, but was adversely affected by these cues being conflicting. On the other hand, with full-spectrum stimuli, NH listeners’ intonation recognition was not affected by cues being cooperating or conflicting. The effects of cues being cooperating or conflicting were comparable between the CI group and NH listeners with spectrally-degraded stimuli. These findings suggest the importance of taking multiple acoustic sources for speech recognition into consideration in aural rehabilitation for CI recipients.
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影响因子：
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通讯作者：
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