The flow of exhaled breath is too large, and the throat vocal cords and breath cannot be effectively coordinated. The closing force of the vocal cords will be far less than the impact force of the air flow; in the rolling of the air, sound, and word chains, I always feel that the power is not enough, the air is not enough, and the physical energy consumption control sound difficult, low pitch, and some will sound hoarse, emptyempty, dark, cloudy, no color, and unclear articulation. This is the sound caused by the leak