Thanks for writing to H.C.M. for your queries.
I have gone through clinical history of your child as you said your child is having profound hearing loss
due to meningitis
. You want to change the hearing aid
, No doubt every aid has got it's plus point and negative points . Quality of Siemens is better, Here I would like to tell you that you may also think about cochlear implant
which will be more beneficial to him. For cochlear implant you have to contact an ENT doctor, who is doing this surgery will be good suggestion.