As the esophageal voice is the one produced by the air forced into the esophagus and then brought back into the mouth, it somewhat differs from the ordinary belch.
｡?ow to swallow air (Swallowing method)
When you take a little water into your mouth and swallow (inject) it together with air, you can drink in the water easily, and the air will escape into the nasal cavity. It takes a lot of effort and practice to swallow air only, but any one is sure to succeed if he tries again and gain untiringly.
Practice
1) Draw quietly a deep abdominal breath several times.
