And a trend of devocalization in sonant can also be found.
辅音清浊对立逐渐消失，有浊音清化的趋势。
It is difficult to synthesize the sonant in the speech synthesis especially in the synthesizing diphthong in speech synthesis.
语音合成中以浊音合成为难点，尤其是在做多元音合成时尤为突出。
Mixed excitation model can extract the pitch better and describe the pitch wave better, so it has the capability of describing the excitation of sonant.
研究发现由于混合激励模型能够很好地提取浊音的基音周期，并能良好的描述语音的基音周期波形，所以它具备很好的描述浊音激励的能力；
Mixed excitation model can extract the pitch better and describe the pitch wave better, so it has the capability of describing the excitation of sonant.
研究发现由于混合激励模型能够很好地提取浊音的基音周期，并能良好的描述语音的基音周期波形，所以它具备很好的描述浊音激励的能力；
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