Time-compression thresholds for Mandarin sentences in normal-hearing and cochlear implant listeners
Time-compression thresholds for Mandarin sentences in normal-hearing and cochlear implant listeners
复制标题
正常听力和人工耳蜗收听者普通话句子的时间压缩阈值
DOI：
10.1016/j.heares.2019.01.011
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发表时间：
2019-03-15
期刊：
影响因子：
2.8
通讯作者：
Schnupp, Jan W. H.
中科院分区：
文献类型：
--
作者：
Meng, Qinglin;Wang, Xianren;Schnupp, Jan W. H.
语速快可能有助于更有效的交流，但如果语速太快，就会变得难以理解。采用自适应阶梯法测量时间压缩阈值（tct），量化正常听力（NH）和人工耳蜗（CI）听者在句子语境中理解普通话单词的最大速度。在实验1中，我们将来自普通话语音感知（MSP）和普通话噪音听力测试（MHINT）语料库的原始语音和ci语音编码的时间压缩语音通过耳机呈现给10名NH受试者。实验2在隔音室内通过扬声器向10名CI被试和另外10名NH被试播放原始时间压缩语音。句子在不改变其光谱轮廓的情况下被时间压缩，并且在一次试验中被呈现多达三次。在每次试验结束时，对句子中正确识别的单词数量进行评分。在心理物理程序中跟踪了50%单词的识别阈值。观察到MSP和MHINT语音的中位tct非常相似。对于NH听众来说，正常语音的中位数tts约为16.7个音节/秒，而8通道和4通道语音编码语音的中位数tts分别为11.8和8.6个音节/秒。对于CI听众来说，tct只有6.8个音节/秒左右。各队列tct的四分位数差均小于3.0个音节/秒。实验2也测量了噪声下的语音接收阈值，发现其与CI听者的tct有很强的相关性。综上所述，大多数非汉语被试的普通话句子tts在16.7个音节/s左右，而CI听者的tts很少超过10.0个音节/s，这定量地说明了cl快速语音信息处理的上限。(C) 2019 Elsevier B.V.版权所有
Faster speech may facilitate more efficient communication, but if speech is too fast it becomes unintelligible. The maximum speeds at which Mandarin words were intelligible in a sentence context were quantified for normal hearing (NH) and cochlear implant (CI) listeners by measuring time-compression thresholds (TCTs) in an adaptive staircase procedure. In Experiment 1, both original and CI-vocoded time compressed speech from the MSP (Mandarin speech perception) and MHINT (Mandarin hearing in noise test) corpora was presented to 10 NH subjects over headphones. In Experiment 2, original time compressed speech was presented to 10 CI subjects and another 10 NH subjects through a loud-speaker in a soundproof room. Sentences were time-compressed without changing their spectral profile, and were presented up to three times within a single trial. At the end of each trial, the number of correctly identified words in the sentence was scored. A 50%-word recognition threshold was tracked in the psychophysical procedure. The observed median TCTs were very similar for MSP and MHINT speech. For NH listeners, median TCTs were around 16.7 syllables/s for normal speech, and 11.8 and 8.6 syllables/s respectively for 8 and 4 channel tone-carrier vocoded speech. For CI listeners, TCTs were only around 6.8 syllables/s. The interquartile range of the TCTs within each cohort was smaller than 3.0 syllables/s. Speech reception thresholds in noise were also measured in Experiment 2, and were found to be strongly correlated with TCTs for CI listeners. In conclusion, the Mandarin sentence TCTs were around 16.7 syllables/s for most NH subjects, but rarely faster than 10.0 syllables/s for CI listeners, which quantitatively illustrated upper limits of fast speech information processing with Cls. (C) 2019 Elsevier B.V. All rights reserved.