韻圖中嘅清濁是就發音方法而論嘅。傳統音韻學喺呢方面嘅術語係有啲含混不清嘅。一般來講清或全清指現代語音學中的清擦音或不送氣清塞音，若兩種術語並舉，則前指擦音，後指塞音； 濁或全濁指濁擦音或濁塞音，若兩者並舉則前指擦音，後指塞音。清濁或次濁指鼻音、流音。喺《韻鏡》裏邊脣、舌、牙、齒音嘅右數第一列，上標「清」者爲不送氣塞音，即全清。右數第三列，上標「濁」者爲濁塞音，即全濁。喉音欄右屬首列係零聲母——都可以理解成喉塞音。其他單標「清」或「濁」字嘅列都喺所在欄相同部位嘅擦音。喉音嘅「清濁」對映嘅音位係中古聲母的喻三和喻四，實際音值如何，有爭議。「舌音齒」嘅右、左分別對映三十六字母中的「半舌」、「半齒」。
The voicelessness in the rhyme diagram is in terms of pronunciation method. The terminology of traditional phonology in this regard is somewhat ambiguous. Generally speaking, clear or full clear refers to the clear fricative or unaspirated clear plosive in modern phonetics, if the two terms are used together, the anterior fricative, the posterior plosive, and the voiced or voiced fricative, if the two together, the anterior fricative, the posterior plosive. Voiced or voiced refers to nasal and flowing voices. In the first column from the right of the belly, tongue, teeth, and teeth in the "Rhyme Mirror", the superscript "clear" is an unaspirated stopper, that is, completely clear. In the third column from the right, the superscript "voiced" is voiced stop, that is, voiced. The first column of the right genus of the guttural bar is polyphonic – which can also be understood as a guttural stop. The other columns with the single "clear" or "voiced" characters are fricatives in the same part of the column. The phonemes of the "voiced" counterpoint of the guttural sound are Yu 3 and Yu 4 of the Middle Initials, and the actual sound value is controversial. The right and left sides of the "tongue teeth" correspond to the "half tongue" and "half teeth" in the 36 letters, respectively.