I just found my son with profound hearing loss a month ago who is 1 year 9 months old, started using the hearing aid from the day 3, wearing it for past 1 month, can see improvement like trying to say wat we say and gives lots of different sounds, don't know whether this aid itself will help my kid for his speech development or need to go for CI, or whether to go for a better hearing aids. He is now using siemens Lotus SP 23 digital model. Need suggestions for decision making.