｡?njection or inhalation of air is often compared to swimming. The sensation you have when you succeed in injecting or inhaling air is like that when you find yourself floating for the first time on the water while you are learning to swim having been taught lots of theories, or like that when you find you can ride a bicycle while practicing with it. Once you have learned how to inject or inhale air, you will never forget the motor sensation like that.
2. How to Expel Air; How to Produce the Basic Sound
When you have learned to send air into your esophagus with ease either by swallowing or inhalation, you will practice bringing it back with a belch - like sound.
