Yes that's what I'd like to believe could happen. SPI-1005 would be like a band-aid for emergencies when you'd been over exposed to noise, whereas FX-322 would be the actual fix.
Synapses, I'm not sure at all. It didn't jump out at me how they might fit into those models in any particular way. Personally I'm sold on the OHC death / Type II afferent sensitization research now when it comes to the cochlea part of noxacusis. I've just not seen anything, that I can remember at least, to suggest synapses have anything to do with noxacusis, (admittedly though I haven't really searched for it. It was pure speculation when I started that
other thread based on the fact that I believed if OHC damage was behind noxacusis why don't so many more people get it? Therefore I believed it had to be something else. Synapses?). I'd be interested to see how noxacusis sufferers extended audiograms compare in the ultra high frequencies.
Just a pure wild guess but could synapses maybe have more to do with tinnitus? (The permanent, stable, fixed type of tinnitus assuming no inflammation, which then gets modulated by noxacusis / any other type of inflammation?) Pure speculation though.
EDIT - I don't know the answer to this, might even be a stupid question, but would disconnected synapses show up as hearing loss on a audiogram the same way that hair cell damage does? If so, you wouldn't be able to differentiate between the 2 pathology would you?