The Phonetics of Multiple Vowel Lengthening in Japanese


Many languages exploit a short vs. long lexical contrast in vowels. In most, if not all of these languages, the contrast is binary. In Japanese, however, speakers can lengthen vowels to express emphasis, and multiple degrees of lengthening can be used to express different degrees of emphasis. This paper offers the first experimental documentation of this emphatic vowel lengthening phenomenon. The current results demonstrate that, among the seven speakers recorded, at least a few speakers show six-levels of distinction in duration, and all but one speaker showed a steady linear correlation between duration and level of emphasis. We conclude that Japanese speakers have articulatory control that allows them to make very fine-grained durational distinctions, which go beyond mere binary short vs. long distinctions.

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Kawahara, S. and Braver, A. (2013) The Phonetics of Multiple Vowel Lengthening in Japanese. Open Journal of Modern Linguistics, 3, 141-148. doi: 10.4236/ojml.2013.32019.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Aizawa, Y. (1985). Intensification by so-called “choked sounds”—long consonants—in Japanese. The Study of Sounds, 21, 313-324.
[2] Behne, D., Arai, T., Czigler, P., & Sullivan, K. (1999). Vowel duration and spectra as perceptual cues to vowel quantity: A comparison of Japanese and Swedish. Proceedings of ICPhS 1999, 857-860.
[3] Bird, S. (2004). Lheidli intervocalic consonants: Phonetic and morphological effects. Journal of the International Phonetic Association, 34, 69-91. doi:10.1017/S0025100304001616
[4] Boersma, P. (1998). Functional phonology: Formalizing the interaction between articulatory and perceptual drives. The Hague: Holland Academic Graphics.
[5] Boersma, P., & Weenink, D. (1999-2013). Praat: Doing phonetics by computer. Software.
[6] Braver, A., & Kawahara, S. (2012). Complete and incomplete neutralization in Japanese monomoraic lengthening. Newark, NJ: Rutgers University.
[7] Cedrus Corporation (2010). Superlab v. 4.0. Software.
[8] Chen, M. (1970). Vowel length variation as a function of the voicing of the consonant environment. Phonetica, 22, 129-159. doi:10.1159/000259312
[9] Cho, T. (2001). Effects of morpheme boundaries on gestural timing: Evidence from Korean. Phonetica, 58, 129-162. doi:10.1159/000056196
[10] Diehl, R., Lindblom, B., & Creeger, C. (2004). Increasing realism of auditory representations yields further insights into vowel phonetics. Proceedings of ICPhS, XV, 1381-1384.
[11] Engstrand, O., & Krull, D. (1994). Durational correlates of quantity in Swedish, Finnish and Estonian: Cross-language evidence for a theory of adaptive dispersion. Phonetica, 51, 80-91. doi:10.1159/000261960
[12] Flemming, E. (1995). Auditory representations in phonology. Doctoral Dissertation, Los Angeles, CA: University of California Los Angeles.
[13] Flemming, E. (2004). Contrast and perceptual distinctiveness. In B. Hayes, R. Kirchner, & D. Steriade (Eds.), Phonetically based phonology (pp. 232-276). Cambridge: Cambridge University Press. doi:10.1017/CBO9780511486401.008
[14] Frazier, M. (2006). Output-output faithfulness to moraic structure: Evidence from American English. In C. Davis, A. R. Deal, & Y. Zabbal (Eds.), Proceedings of north east linguistic society (pp. 1-14). Amherst: GLSA Publications.
[15] Han, M. (1962). The feature of duration in Japanese. Onsei no Kenkyuu [Studies in Phonetics], 10, 65-80.
[16] Hirata, Y. (2004). Effects of speaking rate on the vowel length distinction in Japanese. Journal of Phonetics, 32, 565-589.? doi:10.1016/j.wocn.2004.02.004
[17] Hirata, Y., & Lambacher, S. G. (2004). Role of word-external contexts in native speakers’ identification of vowel length in Japanese. Phonetica, 61, 177-200. doi:10.1159/000084157
[18] Hirata, Y., & Tsukada, K. (2009). Effects of speaking rate and vowel length on formant frequency displacement in Japanese. Phonetica, 66, 129-149. doi:10.1159/000235657
[19] Hoequist, C. E. (1982). Duraional correlates of linguistic rhythm categories. Phonetica, 40, 19-31. doi:10.1159/000261679
[20] Hoogshagen, S. (1959). Three contrastive vowel lengths in Mixe. Zeitschrift für Phonetik und allgemeine Sprachwissenschafe, 12, 111115.
[21] Ishihara, S. (2003). Intonation and interface conditions. Doctoral Dissertation, Cambridge, MA: MIT.
[22] Jany, C. (2006). Vowel length and phonation contrasts in Chuxnabán Mixe. Santa Barbara papers in linguistics 18: Proceedings from the 9th Annual Workshop on Native American Language.
[23] Jany, C. (2007). Phonemic versus phonetic correlates of vowel length in Chuxnabán Mixe. Proceedings of Berkeley linguistics society 33S: Languages of Mexico and Central America. Berkeley: Berkeley Linguistics Society.
[24] Kakehi, K., & Hirose, Y. (1997). Taishoo-kenkyuu-o riyoosh-ita moora suu chikaku-no kentou [Constructive study on mora identification]. Onsei Kenkyuu [Journal of the Phonetic Society of Japan], 1, 23-28.
[25] Kawahara, S. (2001). Similarity among variants: Output-variant correspondence. BA Thesis, Tokyo: International Christian University.
[26] Kawahara, S. (2006). A faithfulness ranking projected from a perceptibility scale: The case of [+voice] in Japanese. Language, 82, 536-574. doi:10.1353/lan.2006.0146
[27] Kawahara, S. (2012a). Amplitude changes facilitate categorization and discrimination of length contrasts. IEICE Technical Report. The Institute of Electronics, Information, and Communication Engineers, 112, 67-72.
[28] Kawahara, S. (2012b). Durational properties of emphatic consonants in Japanese. Newark, NJ: Rutgers University.
[29] Kawahara, S. (2013). Emphatic gemination in Japanese mimetic words: A wug-test with auditory stimuli. Language sciences.
[30] Kawahara, S., & Shinya, T. (2008). The intonation of gapping and coordination in Japanese: Evidence for international phrase and utterance. Phonetica, 65, 62-105. doi:10.1159/000130016
[31] Kingston, J., & Diehl, R. (1994). Phonetic knowledge. Language, 70, 419-454. doi:10.2307/416481
[32] Kinoshita, K., Behne, D., & Arai, T. (2002). Duration and F0 as perceptual cues to Japanese vowel quantity. Proceedings of ICSLP, Denver, 757-760.
[33] Kluender, K., Diehl, R., & Wright, B. (1988). Vowel-length differences before voiced and voiceless consonants: An auditory explanation. Journal of Phonetics, 16, 153-169.
[34] Labrune, L. (2012). The phonology of Japanese. Oxford: Oxford University Press.
[35] Ladefoged, P., & Maddieson, I. (1996). The sounds of the world’s languages (2nd ed.). Oxford: Blackwell Publishers.
[36] Lehiste, I. (1970). Suprasegmentals. Cambridge: MIT Press.
[37] Liljencrants, J., & Lindblom, B. (1972). Numerical simulation of vowel quality systems: The role of perceptual contrast. Language, 48, 839-862. doi:10.2307/411991
[38] Lindblom, B. (1986). Phonetic universals in vowel systems. In J. Ohala, & J. Jaeger (Eds.), Experimental Phonology (pp. 13-44). Orlando: Academic Press.
[39] Lisker, L. (1986). “Voicing” in English: A catalog of acoustic features signaling /b/ versus /p/ in trochees. Language and Speech, 29, 3-11.
[40] Liu, F., & Xu, Y. (2005). Parallel encoding of focus and interrogative meaning in Mandarin intonation. Phonetica, 72, 70-87. doi:10.1159/000090090
[41] Maekawa, K. (1998). Phonetic and phonological characteristics of paralinguistic information in spoken Japanese. Proceedings of ICSLP 1998, Australian Speech Science and Technology Association, Incorporated (ASSTA).
[42] Moreton, E., & Amano, S. (1999). Phonotactics in the perception of Japanese vowel length: Evidence for long distance dependencies. Proceedings of the 6th European Conference on Speech Communication and Technology, Budapest.
[43] Myers, S., & Hansen, B. (2007). The origin of vowel length neutralization in final position: Evidence from Finnish speakers. Natural Language and Linguistic Theory, 25, 157-193. doi:10.1007/s11049-006-0001-7
[44] Nasu, A. (1999). Chouhukukei onomatope no kyouchou keitai to yuuhyousei (Emphatic forms of reduplicative mimetics and markedness). Nihongo/Nihon Bunka Kenkyuu, Japan/Japanese Culture, 9, 13-25.
[45] Padgett, J. (2002). Contrast and postvelar fronting in Russian. Natural Language and Linguistic Theory, 21, 39-87. doi:10.1023/A:1021879906505
[46] Pluymaekers, M., Ernestus, M., Baayen, H., & Booij, G. (2010). Morphological effects on fine phonetic detail: The case of Dutch igheid. In C. Fougeron, B. Kühnert, M. D’Imperio, & N. Vallée (Eds.), Laboratory Phonology 10 (pp. 511-531). Berlin: Mouton De Gruyter.
[47] Podesva, R. (2000). Constraints on geminates in Burmese and Selayarese. In R. Bilerey-Mosier, & B. D. Lillehaugen (Eds.), Proceedings of West Coast Conference on Formal Linguistics 19 (pp. 343356). Somerville: Cascadilla Press.
[48] Port, R., Dalby, J., & O’Dell, M. (1987). Evidence for mora timing in Japanese. Journal of the Acoustical Society of America, 81, 15741585. doi:10.1121/1.394510
[49] Prince, A. (1980). A metrical theory for Estonian quantity. Linguistic Inquiry, 11, 511-562.
[50] R Development Core Team (1993-2013). R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria.
[51] Schwartz, J.-L., Boe, L.-J., Valleé, N., & Abry, C. (1997a). The dispersion focalization theory of vowel systems. Journal of Phonetics, 25, 255-286. doi:10.1006/jpho.1997.0043
[52] Schwartz, J.-L., Boe, L.-J., Valleé, N., & Abry, C. (1997b). Major trends in vowel system inventtories. Journal of Phonetics, 25, 233253. doi:10.1006/jpho.1997.0044
[53] Taheri, A. M., & Xu, Y. (2012). Phonetic realization of prosodic focus in Persian. Proceedings of Speech and Prosody 2012, Shanghai.
[54] Thomas, K. D., & Shaterian, A. (1990). Vowel length and pitch in Yavapai. In M. Langdon (Ed.), Papers from the 1990 Hokan-Penutian languages workshop (pp. 144-153). University of Southern Illinois.
[55] Turk, A., Nakai, S., & Sugahara, M. (2006). Acoustic segment durations in prosodic research: A practical guide. In S. Sudhoff, D. Lenertova, R. Meyer, S. Pappert, P. Augurzky, I. Mleinek, N. Richter, & J. Schliesser (Eds.), Methods in Empirical Prosody Research (pp. 1-27). Berlin: Walter de Gruyter. doi:10.1515/9783110914641.1
[56] Xu, Y., & Xu, C. X. (2005). Phonetic realization of focus in English declarative intonation. Journal of Phonetics, 33, 159-197. doi:10.1016/j.wocn.2004.11.001

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