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Heng is located in southeastern Guangxi. Prefix and is one of the representative points Pinghua in Southern, previous research on Prefix and less. Research results are generally identified using the traditional port ears than four tones derived class methods, studies have limited voice phonological introduction, were compared with other aspects of medieval tone. In this paper, Heng Tao Wei Ping, then as the inspection object, using experimental phonetics, acoustic experimental methods to study the word reconcile the double word transfer, on this basis, in order to deepen the study of the depth, expanding the breadth of research. This total of five parts. The first part of the \And describes the content of this study, methods, purpose and meaning. The second part of the \The third part of the \Give an account of experimental materials, methods, and experimental process, we use Praat speech analysis software for acoustic analysis, using Praat script for data processing, using the T value method for pitch data is normalized, transformed into the traditional five values. Specific method is to get the word baseband modulation, duration and other acoustic data, and then normalized to draw long syllable word reconcile the pattern diagram. Experimentally derived word tone pattern is yinping 34, Hinata 13, overcast on 33 yang 22, overcast to 454, Yang went to 41; 4 on IVA, IVA under 33, on the sun into two, into the wire under the sun, and conclusions of previous studies is not consistent. Length modes are: IA gt; Hinata gt; Yin on gt; yang gt; Yin go gt; IIIB gt; under the sun into gt; under IVA gt; Shang Yang into gt; on IVA. The fourth part of the \Give an account of experimental materials, methods and processes. First get double word tone baseband acoustic data, and then normalized, transformed into five values. Depending on the chart data and then discuss each classification category double word before and after adjusting the position of the transposition situation, from the inductive double-word tone sandhi patterns. Finally, from the perspective of typology to explore Heng Tao Wei Ping, then double-word sandhi type and condition. Heng Tao Wei Ping, then 100 kinds of double word linking group, there are 82 kinds of tone sandhi patterns, which has 66 group produced a tone sandhi. Modulation types are bits of tone sandhi and non-aligning two types of modulation, in which adjustment can be subdivided into bit of tone sandhi type of alienation, and in type sandhi, simplified and self-sandhi alternation type sandhi to neutralize type Tone Sandhi based. Tortuous tune type IIIA (T5) and the male voice category Shu tone (T2, T4, T6) the distinctive tone. Last part of the \Including Heng Tao Wei Ping Dialect words and tone tone tone pattern and characteristics of the performance of a long, two-word sandhi patterns and types, and so on.
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