I am completely deaf in my right ear and have perfect hearing in my left. So I am totally SSD. The way it works is both through some bone conduction and through cochlear transference or something like that. So you wear the aid in your DEAF ear and the sound is transmitted through to your GOOD ear. Freaky, right? Same concept as BAHA but slightly less strong, clear and no surgery.
Okay, so here is that link http://www.audiologyonline.com/articles/pf_article_detail.asp?article_id=1629 and from that link the relevant part (and my apologies if this is again TOS, let me know if it is)
"These authors suggest placing a conventional high gain/high output air conduction hearing aid in the impaired ear to take advantage of the fact that the cochleas for each ear, which are contained within the temporal bones, are not acoustically isolated. That is, if an air conducted signal of high intensity is presented to the cochlea of an impaired ear, the signal will eventually be heard in the cochlea of the better ear because it will be intense enough to overcome the acoustic isolation (interaural attenuation [IA]) between the cochleas...
Signals picked up by the microphone of a hearing aid placed over or in the impaired ear can be amplified and eventually cross through the head and be heard by the cochlea of the normal ear via bone conduction (Miller, 1989)." (italics mine)
My thinking is... start LOW tech/LOW intervention and move up if I need it. Because I really only need an aid sometimes. I am thinking that I can get the custom aid done in a couple weeks, see what I think for a month and then if I don't like it, nothing lost and I can still schedule the BAHA. But why go for surgery if the aid works fine.
It wasn't as good. My audiologist said high pitches get dampened by the head and that it wouldn't be as quick and as clear, but it was okay for what I want, I think. I mean it just sounds a little quieter and a little tiny bit less sharp.