This study addresses the two-way laryngeal contrast of plosives in Tokyo Japanese, which is commonly analyzed as a “true voicing” language. We examine how voicing-related properties of the plosive and f0 of the following vowel varied with the position in the word and in the sentence. We compare word-initial with word-medial positions for words in citation (between two pauses) and for two prosodic conditions in a carrier sentence: with vs. without a preceding pause. In word-initial position, unlike in a typical “true-voicing” language such as French, voiced plosives in Tokyo Japanese show a high devoicing rate, while voiceless plosives are moderately aspirated. A combination of VOT and f0 of the following vowel is used to distinguish the two plosive series. In word-medial position, voiced plosives are frequently prevoiced and voiceless plosives are unaspirated, while f0 does not differ after the two plosive series. This positional variation suggests that the onset-induced f0 effect is enhanced in word-initial position, where the VOT cue is not sufficient, but not in word-medial position, where the plosive voicing contrast is robustly marked by presence vs. absence of phonetic voicing. The differential use of cues in different environments in Tokyo Japanese provides another piece of evidence for the complexity of phonetic implementations of the voicing contrast. Finally, we discuss the enhancement of f0 perturbations as a source of a potential tonal development and ask whether such a development would take place in Tokyo Japanese.

这项研究解决了东京日语中爆破音的喉咙两向对比，通常将其分析为“真正的发声”语言。我们研究了后面的元音的音节和f 0的发声相关特性如何随单词和句子中的位置而变化。我们将引文中的单词（两次暂停之间）和一个带载体的句子中的两个韵律条件的单词初始位置与单词中间位置进行比较：带vs.不带前面的暂停。在单词初始位置，与典型的“真正发声”语言（例如法语）不同，东京的浊音发音人的清语音率很高，而清音浊音则被​​中等程度地吸引。VOT和f的组合以下元音中的0用来区分两个音素序列。在单词居中的位置上，发浊的音调经常发声，而无声的音调则不吸气，而在两次发声序列之后，f 0不变。这种位置变化表明，在单词初始位置（VOT提示不足）但在单词中间位置（其爆破声对比强烈地由存在或不存在的强烈标记）中，起始诱导的f 0效果增强。语音发声。在东京日语中，不同环境中线索的不同用法为语音对比的语音实现的复杂性提供了另一条证据。最后，我们讨论f的增强0扰动是潜在音调发展的根源，并问这样的发展是否会在东京日语中发生。