Should not be too young. Generally, it is required to be over one year old. At present, most experts in Beijing 3A hospitals require children to weigh more than 18 kg. The minimum implantation age is 5 or 6 months. The earlier the child is implanted, the better the later recovery will be. Adults can have cochlear implant surgery if they are diagnosed as cochlear indications and in good health. The doctor usually explains to his parents before the operation.