Abstract
The author has treated the tympanic symptoms of ear-drums with perforation caused by closing of the eustachian tube. The following conclusions were obtained:
1) It was found that there were two types of the tympanic symptoms due to closing of the eustachian tube: the one was that by the negative pressure of the tympanum, and the other was that by some other causes.
2) Therefore, the tympanic inflation helped in stabilizing the air pressure in the tympanum as well as in reducing the tympanic symptoms by effecting the various parts of the middle ear.
