Baese-Berk Melissa M, Morrill Tuuli H
Department of Linguistics, 1290 University of Oregon, 279 Straub Hall, Eugene, Oregon 97403, USA
Program in Linguistics, Department of English, George Mason University, 4400 University Drive 3E4, Fairfax, Virginia 22030, USA
J Acoust Soc Am. 2015 Sep;138(3):EL223-8. doi: 10.1121/1.4929622.
Non-native speech differs from native speech in multiple ways. Previous research has described segmental and suprasegmental differences between native and non-native speech in terms of group averages. For example, average speaking rate for non-natives is slower than for natives. However, it is unknown whether non-native speech is also more variable than native speech. This study introduces a method of comparing rate change across utterances, demonstrating that non-native speaking rate is more variable than native speech. These results suggest that future work examining non-native speech perception and production should investigate both mean differences and variability in the signal.
非母语语音在多个方面与母语语音不同。先前的研究已经从群体平均水平描述了母语和非母语语音在音段和超音段方面的差异。例如，非母语者的平均语速比母语者慢。然而，非母语语音是否也比母语语音更具变异性尚不清楚。本研究引入了一种比较不同话语间语速变化的方法，证明非母语语速比母语语音更具变异性。这些结果表明，未来研究非母语语音感知和生成的工作应同时考察信号中的平均差异和变异性。
