After tympanic tube placement, some of the hearing will be restored, most notably because of the tympanic tube placement itself, which is done because of chronic otitis media as well as abnormal functioning of the Eustachian tube. After the surgery, the symptoms of ear stuffiness will change, and the hearing may improve partially. However, for hearing to be restored, it is necessary to be able to detube normally six months after the placement of the tubes, and after detubing, the tympanic membrane grows back, the symptoms of otitis media do not occur again, and the function of the Eustachian tube is restored, so that hearing can be restored completely at this time. In this case, it is necessary for the tympanic membrane to grow back and the hearing to be restored after half a year of normal detubing, i.e., after tube placement.