不同言語速度下國語韻律的計時等時性

The Timing Isochrony of Spoken Mandarin at Different Speaking Rates

10.6129/CJP.2008.5001.01

鄭靜宜(Jing-Yi Jeng)

韻律 ； 言語計時 ； 等時性 ； 成對變異指數 ； 知覺中心 ； rhythm ； speech timing ； isochrony ； pairwise variation index PVI ； perceptual center

中華心理學刊

50卷1期（2008 / 03 / 01）

1 - 19

繁體中文

本研究的主要目的在了解國語說話者在語音製造和知覺的韻律計時特性，考驗國語以音節計時的假設。實驗一使用的語音材料包括三十三個片語句組及兩篇短文，有三十位正常的說話者（男女各半）參與錄音實驗。由於言語中時長變項易受到語速影響，為控制語速在實驗一中先使用節拍器調節說話者的語速，再讓說者以同樣的速度說出語句。共有五種語速變化。以頻譜圖分析各說話者在各句中各音段的時長（子音、母音、停頓等）。使用成對變異指數(pairwise variability index, PVI)比較語句中兩種假設性等時單位（全音節單位、母音起始單位）的時長變異性。結果發現母音起始單位的PVI顯著小於以全音節為計時單位的PVI，顯示母音起始單位較具有等時性。以母音為計時單位起點正是所謂的語音知覺中心(perceptual center, P-center)的所在。實驗二使用較自然的語速控制方式，說者先聽語速示範帶後再說出句子。有二十一位正常的說話者（男女各半）參與錄音，並分析各語句音段時長後，同樣地以PVI考驗兩種計時單位的等時性，結果和實驗一相近似。實驗一和實驗二的結果顯示不管使用何種語速控制方式母音起始單位皆顯著地比全音節單位較具有等時性。在實驗三中有十八位受試者評估具有不同PVI句子的自然度，結果發現自然度分數和PVI值呈現高負相關，即PVI值愈大聽起來愈不自然，並發現使用母音起始單位計算的PVI值和自然度分數間的相關高於使用全音節單位PVI和自然度間的相關。無論是在言語的製造和知覺方面，本研究的結果支持母音起始單位為國語韻律計時的等時單位。

The behavior of speech timing plays an important role in the process of speech perception and production. The source of speech rhythm is based on the ”isochrony”. Isochrony unit is a hypothetical unit which has an equal duration interval existing in the speech stream. The users of a language base on the isochrony unit to process the speech information during speech process. The purpose of this study is to investigate two candidates of speech timing units in connected Mandarin. The first candidate is ”the whole syllables unit (pause/gap+CV)” and the other is ”the rime onset unit (rime+pause/gap+C)”. This study consists of three experiments; the first two experiments are production tasks, and the third is a perceptual task. In the first experiment, 30 mandarin speakers read 33 sets of Chinese phrases and sentences and two passages at five speaking rates by using a metronome to modulate the speaking rates. Segmental durations were obtained via acoustic analysis, and then, the pairwise variation index (PVI) was computed for the two candidate units to compare the degree of isochrony. The results show that the rime onset unit had significantly less PVI value than the whole syllable unit, and the two kinds of units had the maximum difference at the slow speaking rates, but at the fast speaking rates there was no difference between them. The second experiment is the replicate of the first one, and the major difference is the method of speaking rate control. The second experiment had similar results as the first one, again, the rime onset unit had the less PVI. In the third experiment, 18 listeners estimated the degree of naturalness of 24 sentences with different PVI values. The results show that the degree of naturalness is highly correlated with PVI values; moreover, for the PVI calculated by the rime onset unit, the correlation is stronger than that by whole syllable unit. These findings support the rime onset unit is the isochrony unit in speech timing process of Mandarin. The results suggest the basic unit of Mandarin speech timing is related with rime onset, where is also known as the locus of ”perceptual center”.

1. Abercrombie(1967).Elements of General Phonetics.
2. Allen,G D(1972).The location of rhythmic stress heats in English: An experimental study II.Language and Speech,15,179-195.
3. Allen,G D(1972).The location of rhythmic stress beats in English: an experiment study I.Language and Speech,15,72-100.
4. Assmann(1995).The role of formant transitions in the perception of concurrent vowels.Journal of the Acoustical Society of America,97,575-584.
5. Beckman.M(1982).Segment duration and the ‘mora' in Japanese.Phonetica,39,113-135.
6. Praat: Doing phonetics by computer
7. Buxton, H,Cutler,D. R. Ladd (Eds.)(1983).Prosody: Models & Measurement.Springer-Verlag:Berlin.
8. Classe, A(1939).The Rhythm of English Prose.Oxford:Basil Blackwell.
9. Couper-Kuhlen, E(1990).Discovering rhythm in conversational English: Perceptual and acoustic approaches to the analysis of isochrony.University of Konstance, Fachgruppe Sprachwissenschaft.
10. Couper-Kuhlen, E(1993).English Speech Rhythm: Form and Function in Everyday Verbal Interaction.Amsterdam:Benjamins.
11. Dauer, R. M(1983).Stress-timing and syllable-timing reanalyzed.Journal of Phonetics,11,51-62.
12. de Jong, K. J.(1994).The correlation of P-center adjustments with articulatory and acoustic events.Perception & Psychophysics,56,447-460.
13. Fowler, C. A(1979).“Perceptual centers” in speech production and perception.Perception & Psychophysics,25,375-388.
14. Grabe, E,Low, E. L,C. Gussenhoven,N. Warner (Eds.)(2002).Laboratory Phonology VII.The Hague:Mouton de Gruyter.
15. Han, M. S(1994).Acoustic manifestations of mora timing in Japanese.Journal of the Acoustical Society ofAmerica,96,73-82.
16. Harsin, C. A(1993).Acoustics of perceptual centers in speech.Journal of the Acoustical Society of America,94,1864.
17. Harsin, C. A,Green, K. P(1994).Perceptual centers as an index of speech rhythm.Journal of the Acoustical Society of America,96,3350.
18. Lehiste, I(1973).Rhythmic units and syntactic units in production and perception.Journal of the Acoustic Society of America,54,1228-1234.
19. Lehiste, I.(1977).Isochrony reconsidered.Journal of Phonetics,5,253-263.
20. Low. E. L,Grabe. E,Nolan. F(2000).Quantitative characterizations of speech rhythm: Syllable-timing in Singapore English.Language and Speech,43(4),377-401.
21. Milenkovic, P(2004).TF32 [Speech Acoustical Analysis Software]
22. Morton, J,Marcus, S,Frankish, C(1976).Perceptual centers.Psychological Review,83,405-408.
23. Pike, K(1945).The Intonation of American English. (2nd ed.).MN: University of Michigan Press:Ann Arbor.
24. Pointon, G E(1980).Is Spanish really syllable-timed?.Journal of Phonetics,8,293-304.
25. Port, R. F,Dalby, J,O'Dell, M(1986).Evidence for mora timing in Japanese.Journal of the Acoustical Society of America,81,1574-1585.
26. Roach, P,D. Crystal (Ed.)(1982).Linguistic Controversies.London:Edward Arnold.
27. Stevens, K. N,Blumstein, S. E(1978).Invariant cues for place of articulation in stop consonants.Journal of the Acoustical Society of America,64,1358-1368.
28. Tseng, C. –H,Huang, K.-Y,Jeng, J.-Y.(1996).The role of syllable in perceiving spoken Chinese.Proceeding of National Science Council (ROC) Part C: Humainity and Social Science,5(1),181-204.
29. Tseng, C.-Y,Lee Y.-L(2004).Proceedings of the International Conference on Speech Prosody.Japan:Nara.
30. Van Santen, J. P,Shih, C. L(2000).Suprasegmental and segmental timing models in Mandarin Chinese and American English.Journal of the Acoustical Society of America,107(2),1012-1026.
31. Wenk, B,Wioland, F(1982).Is French really syllable-timed?.Journal of Phonetics,10,193-216.
32. 會進與(1997)。漢語以音階作爲切割單位的新證據。國家科學委員會研究量刊：人文與社會科學，7(4)，612-631。
33. 鄭静宜(2004)。不同發語單位、言語速度和發語詞位置對國語言段時長的影響。南大學報，39，161-165。

1. 鄭靜宜(2009)。學齡前兒童之華語聲母構音在不同韻母音境的不一致性。臺灣聽力語言學會雜誌，24，59-78。
2. 鄭靜宜(2011)。華語語句產生與知覺的計時特性。中華心理學刊，53(3)，323-347。