我国古代分析汉语发音的原理和方法的一门学问,等韵学建立“五音”、“清浊”的原理来分析声母发音部位和发音方法,并且创造一套字母来表示汉语的声母系统;建立“等呼”的理论来分析韵母结构,并且制成若干图表来表明汉 In ancient China, we analyzed the principles and methods of pronunciation in Chinese and established a set of letters to represent the Chinese initial consonant system by establishing the principles of “pentatonic” and “voicing” “Wa etal” theory to analyze the vowel structure, and made a number of charts to indicate the Han