Sadeghi Vahid
Imam Khomeini International University, Iran.
Lang Speech. 2017 Dec;60(4):571-596. doi: 10.1177/0023830916684862. Epub 2017 Jan 23.
Previous literature on the phonetics of stress in Persian has reported that fundamental frequency is the only reliable acoustic correlate of stress, and that stressed and unstressed syllables are not differentiated from each other in the absence of accentuation. In this study, the effects of lexical stress on duration, overall intensity and spectral tilt were examined in Persian both in the accented and unaccented conditions. Results showed that syllable duration is consistently affected by stress in Persian in both the accented and unaccented conditions across all vowel types. Unlike duration, the results for overall intensity and spectral tilt were significant only in the accented condition, suggesting that measures of intensity are not a correlate of stress in Persian but they are mainly caused by the presence of a pitch movement. The findings are phonologically interpreted as suggesting that word-level prominence in Persian is typologically similar to 'stress accent' languages, in which multiple phonetic cues are used to signal the prominence contrast in the accented condition, and stressed and unstressed syllables are different from each other even when the word is not pitch-accented.
以往关于波斯语重音语音学的文献报道称，基频是重音唯一可靠的声学相关特征，并且在没有重音的情况下，重读音节和非重读音节之间没有区别。在本研究中，考察了波斯语中词汇重音在有重音和无重音条件下对时长、整体强度和频谱倾斜度的影响。结果表明，在有重音和无重音条件下，波斯语中音节时长在所有元音类型中都始终受到重音的影响。与时长不同，整体强度和频谱倾斜度的结果仅在有重音条件下显著，这表明强度测量并非波斯语重音的相关特征，而是主要由音高变化的存在导致的。这些发现从音系学角度解释为，波斯语中的词级重音在类型学上类似于“重音重音”语言，在这种语言中，多种语音线索用于在有重音条件下表示重音对比，并且即使单词没有音高重音，重读音节和非重读音节也彼此不同。
