People who practice zealously sometimes complain that they are embarrassed by the stomach blown out and the difficulty in vocalization when they converse or read out a book continuously.
The air remained in the esophagus due to the esophageal speech, which is accumulated down in the stomach, causes swellness. In this situation, it is impossible to inhale air or to vocalize.
The question is how much air should be taken in.
Before answering the question, I would like to mention the region of vocalization. It is easily recognized by putting fingers around the curve under the chin when you are vocalizing. The opening of the trachea is located just below there connected to the lungs.