【摘要】 在汉语口语中,音调频率轮廓对理解语意来说是本质性的声学特微。研究者们已给出了典型的四声音调频率轮廓,看来是可以用单音节的四声自动认识。实际上,有时第三声和第二声的音调频率轮廓在形状上相似,造成仅用音调频率轮廓识别声调的困难。本文提出一个区别第三声于其他声调的简捷判据,它可以用于单音节语音处理中。第三声音调频率轮廓(曲线)的最低转折点出现在整个的音核中点附近,是四声的音调频率轮廓的最低的中点。第三声音调频率轮廓的中点与其他声调区别开来。它可以做为音调频率轮廓的补足来用于声调识别。文中还给出了实验数据。更多还原

【Abstract】 In spoken Chinese,the pitch contour of the Four Tones is an essentialacoustic feature for perception.Previous investigations have given the typicalpitch contours wich seems to be available for autorecognition of the Four Tonesin monosyllabic utterances.In practice,sometime,the shapes of pitch contour ofthe tone 3 and tone 2 are resemble.This makes the recognition diffecult usingthe pitch contour only.In this paper a simple criterion for distinguishing thetone 3 from the others in monosyllabic utterances is proposed.The lowest inflec-tion point of the pitch contour of tone 3 coming near the centre of the wholesyllable nueleus is the lowest centre for the four tones.The distance between thecentre of pitch contour of tone 3 and the another is enough to distinguish them.It is usable as an addition to the pitch contours.Experimental data is given here.更多还原