1. since ENT specialist
has seen her, probably this "hole" could be perforated tympanic memberane, unless only external ear is involved.
2. humming sound could be "tinnitus" which she is experiencing.
3. if perfoation is the cause of hole and humming sound then surgical correction is the cure.
4. because she is under guidance of ENT specialist, he has definitely looked upon the condition and will know about the prognosis of the disease.