Esophageal speech is a learned skill that requires speech training and much practice.

Good esophageal speakers can produce an average of 5 words per breath and 120 words per minute.

Lung cancer, laryngeal cancer, oral cancer, esophageal cancer, bladder cancer, pancreatic carcinoma and other cancer like diseases.

In esophageal speech, pitch and intensity correlate a low pitched voice is produced with low intensity and a high pitched voice is produced with high intensity.

Reports were published in esophageal and pancreatic surgery for the first time in the world and further data was subsequently published by Horgan and his group at the University of Illinois and then later at the same institution by others.