Although deafness can mean many things - I think in most cases it tends to be the upper frequencies that are most affected .... so is is a bit like an average hearer who might lose their 'high end' a bit when they get older except that 'high end' for a deaf person might extend all the way down to middle C .. or lower
I guess if you can find an accurate diagnosis of her, or some other significantly deaf person, you could then use filters to recreate how they would hear music/ speech/ street noise etc. I'm pretty sure in EG's case she can still hear what she plays but with 'significant filters applied' if you see what I mean.
Anyway she is an inspiration regardless of/ because of her deafness.
