How to label the tones of 24 vowels

Vowel pronunciation formula is as follows:

(1) Monovowel (6): ι, O, E, I, U, U.

(2) Polyphonic vowels (8): Ai Yi, Ai Yi, Ai Wei, Ao Ao, Ou Ou, You You, Ai Ye, üe Yue.

(3) Special vowel (1): er.

(4) Pronasal vowels (5): An An, en En, in Because, un Wen, ün Halo.

(5) After nasal vowels (4): ang Ang, eng Heng, ing Ying, ong Bang.

(6) Recognize the whole syllable (16): Zhi (weaving), Chi (eating), Shi (lion), Sun (sun), Zi (word), Ci (thorn), Si (silk), Yi (clothing), Wu (black) and Fish (fish).

The pitch is relative.

The absolute value of the tone is not required. Because different people are different, the tone does not require everyone to pronounce the same high. Because the vocal cords of women and children are shorter and smaller than those of young men, and the wavelength is shorter, the pitch is inversely proportional to the wavelength, so their pitch is higher than that of young men in most cases; In addition, tone sandhi is slippery, unlike jumping from one scale to another.

Baidu encyclopedia-tone