This paper investigates infants' and adults' use of envelope cues and combined onset asynchrony and envelope cues in the segregation of concurrent vowels. Listeners heard superimposed vowel pairs consisting of two different vowels spoken by a male and a female talker and were trained to respond to one specific target vowel, either the male /u:/ or male /i:/. Vowel detection was measured in three conditions. In the baseline condition the two superimposed vowels had similar amplitude envelopes and synchronous onset. In the envelope cue condition, the amplitude envelopes of the two vowels differed. In the combined cue condition, both the onset time and amplitude envelopes of the two vowels differed. Seven-month-old infants' concurrent vowel segregation improved both with envelope and with combined onset asynchrony and envelope cues to the same extent as adults'. A preliminary investigation with 3-month-old infants suggested that neither envelope cues nor combined asynchrony and envelope cues improved their ability to detect the target vowel. Taken together, these results suggest that envelope and combined onset-asynchrony cues are available to infants as they attempt to process competing speech sounds, at least after 7 months of age.

中文翻译：

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婴儿在语音分离中使用孤立的和组合的时间线索。

本文研究婴儿和成人在同时元音的分离中使用包络提示以及结合的异步和包络提示。听众会听到由一对男性和女性说话者说出的两个不同的元音组成的叠加元音对，并经过训练以响应一个特定的目标元音，即男性/ u：/或男性/ i：/。在三种条件下测量元音检测。在基线状态下，两个叠加的元音具有相似的幅度包络和同步起音。在包络提示条件下，两个元音的幅度包络不同。在组合提示条件下，两个元音的开始时间和幅度包络都不同。七个月大的婴儿 包膜以及合并的异步和包膜提示与并发元音分离的改善程度均与成人相同。对3个月大的婴儿进行的初步调查表明，包络线提示以及异步和包络线提示均无法提高其检测目标元音的能力。综上所述，这些结果表明，至少在7个月大以后，婴儿在尝试处理竞争性语音时可以使用包络线和组合的异步异步提示。