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从古今语音的演变情况看，汉语语音明显地呈现出向乐音化发展的趋势；从现代汉语各大方言间发展的不平衡性看，也清楚地印证了汉语语音的这种乐音化发展趋势。文章透过中古汉语“疑、影”两母字在不同方言里反映出来的辅音声母脱落，转读成零声母的情况以及古全浊声母的消失；舒声音节鼻音韵尾［ｍ、ｎ、ｎ］的减少；促声音节塞音韵尾［ｐ、ｔ、ｋ］的减少和消失；入声调类的消失等现象，阐释了汉语语音的乐音化发展趋势。
From the evolvement of ancient and modern phonetics, Chinese phonetics obviously shows the trend of development towards music. From the unbalanced development of the modern Chinese major dialects, it clearly confirms the development trend of this phoneticization of Chinese phonetics. Through the disappearance of consonant initials and disappearance of ancient voiced initial consonants reflected in different dialects by the two Chinese characters “suspect and shadow” in Middle Ancient Chinese, the nasal vowel [m, n, n ]; Decrease and disappearance of the vowel ending [p, t, k] of the vocal segment, and the disappearance of the tonal class, which explains the trend of the development of the vocalization of Chinese speech.