Yes, I was referring to titanium a bit, but maybe I was inaccurate. Acrylic can also do a great job, but titanium can be placed deeper due to the possibility of thinner walls.
Deeper placement, achieving the bony part of the ear canal, greatly decreases the occlusion effect; however, the probability of that effect is already low due to your low-frequency hearing loss.
From my experience (YMMV; I advise consulting with your audiologist), I recommend:
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Deep placement (from the deep silicone impression, at least 5 mm past the second bend of the ear canal, ideally with EasyView Otoblock).
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A pressure vent (0.6 mm diameter) - better isolation from noise, more effective digital noise reduction (AI and non-AI) and it’s easier to avoid comb filter effect.
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A longer plastic removal filament (I found the hard way that the standard 5 mm is too short!).
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Consider a shorter wire length; it gives better directivity due to aligning the two microphones on a horizontal line. I have “0R,” and it is the best for me.
See here:
I perfectly fitted a “0” length despite my rather large appearance.
It gives me even better “s” perception than the “2R” length, which is about 6000 Hz.
- I and @Eduard have chosen a rough surface for better grip in the ear canal, but I needed some time to learn myself how to insert this (more in a spiral manner than simply pushing into the ear canal)