Did you pick out what you want to try or did the audi recommend these dome types for you? I'm surprised that your audi lets you try open domes with your level of loss. I can understand why he/she started you out with a power dome (which I believe the double domes are called). But I can see how you'd hate them with the occlusion problem. The itching may or may not go away, depends on whether your ear canals can adapt to the silicone or not.
I wonder why the audi didn't put you on closed single bass dome with maybe a single vent hole or double vent hole? That was the first natural choice my audi put me on, a closed single bass dome with a single vent hole. After trying out a couple of sizes to find the right one, that was pretty much it. The occlusion is still there but only slightly (as compared to an power dome), but it kept to a minimum and I got used to it real fast. I tried the same dome but with 2 vent holes (the vent holes are tiny compared to the vents in the open domes), but it caused a slight wheezing feedback when I put my headphones on, so I went back to the single vent hole bass dome.
I'd recommend you try that next (single vent hole closed bass dome). If still a little occluded, try the double vent hole next.
If the bass dome still doesn't help, then custom molds would be my last resort. They're not cheap, and they'd feel more occluded, although they can put some vent hole in there to help with the occlusion. If your ear canal is truly very asymmetrical then custom molds may be your only option. At least they'd help out a lot with feedback control as long as you don't have too many vent holes on it.
Last edited by Volusiano; 02-23-2017 at 11:36 AM.
HA wearer since the 1990's > Rexton Insite+ CIC (2011-2016) > Oticon OPN RITE (2016)
KHz 0.25...0.5...0.75...1.0...1.5...2.0...3.0...4.0... 6.0...8.0
Left ...10...10....10.....30.....70....75....80....95.. ..90....80
Right .25...30....40.....55.....75....85....90....90...1 00...100