Dellwo Volker, Leemann Adrian, Kolly Marie-José
Department of Comparative Linguistics, University of Zurich, Plattenstrasse 54, CH-8032 Zurich, Switzerland.
Department of Theoretical and Applied Linguistics, University of Cambridge, Sidgwick Avenue, Cambridge, CB3 9DA, United Kingdom.
J Acoust Soc Am. 2015 Mar;137(3):1513-28. doi: 10.1121/1.4906837.
Between-speaker variability of acoustically measurable speech rhythm [%V, ΔV(ln), ΔC(ln), and Δpeak(ln)] was investigated when within-speaker variability of (a) articulation rate and (b) linguistic structural characteristics was introduced. To study (a), 12 speakers of Standard German read seven lexically identical sentences under five different intended tempo conditions (very slow, slow, normal, fast, very fast). To study (b), 16 speakers of Zurich Swiss German produced 16 spontaneous utterances each (256 in total) for which transcripts were made and then read by all speakers (4096 sentences; 16 speaker × 256 sentences). Between-speaker variability was tested using analysis of variance with repeated measures on within-speaker factors. Results revealed strong and consistent between-speaker variability while within-speaker variability as a function of articulation rate and linguistic characteristics was typically not significant. It was concluded that between-speaker variability of acoustically measurable speech rhythm is strong and robust against various sources of within-speaker variability. Idiosyncratic articulatory movements were found to be the most plausible factor explaining between-speaker differences.
当引入（a）发音速率和（b）语言结构特征的说话者内部变异性时，研究了声学可测量的言语节奏的说话者间变异性[％V、ΔV（ln）、ΔC（ln）和Δpeak（ln）]。为了研究（a），12名标准德语使用者在五种不同的预期节奏条件下（非常慢、慢、正常、快、非常快）朗读了七个词汇相同的句子。为了研究（b），16名苏黎世瑞士德语使用者每人说出16个自发话语（共256个），对这些话语进行了转录，然后由所有使用者朗读（4096个句子；16名使用者×256个句子）。使用对说话者内部因素进行重复测量的方差分析来测试说话者间变异性。结果显示出强烈且一致的说话者间变异性，而作为发音速率和语言特征函数的说话者内部变异性通常不显著。得出的结论是，声学可测量的言语节奏的说话者间变异性很强，并且对说话者内部变异性的各种来源具有鲁棒性。发现独特的发音动作是解释说话者间差异的最合理因素。
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