Should one realize, after a certain period of training, that one has done it wrong, the immediate correction is a must.
Most causes of wrong vocalization lie in that they do not pay much attention to how they take in the air, thinking the acquisition of the basic sound anyway is the first priority. The results tend to be wrong vocalization, which instructors should keep a close eye on. This is considered to be one of the most important points.
Let me show you an example of the case; Mr. A had been practicing for more than one month, and he could speak rather well with the swallowing method, however, he used up the air while speaking, and the volume lowered, so he could not continue conversation. He had to stop conversation to charge air then continue, which interfered the flow of conversation considerably.
