KCL: I guess your dad will require further mapping sessions which may alter what he hears with the Implant. Was this discussed prior to the operations-potential ear problems?
As each one of us are so different physical wise- very hard to advise anyone on these matters. I was older at operation and didn't have that problem.
Good luck and much success to your dad in these trying times.
Implanted Sunnybrook Advanced Bionics-Harmony activated Aug/07