I think in the same way about skin sensitivity
What I also consider to make new mold:
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EasyView Otoblock
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titanium FitGuide?
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more viscosity silicone for impression
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silicone filling with my jaw open (my EVERY earmolds in my life was maked with closed jaw)
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I have almost no problem with occlusion, even when I harder pressing my tragus (light pressing produces strong occlusion, harder pressing diminishes it to zero) when I not wear the HA, so consided no vent or <1mm diameter vent.
I wanted it also because in my city there are many cars with modified, uhmm, “silencers” which produces even 120 dB… I am scared by them.
My last impression didn’t event has second bend. At that point, I knew nothing about the standards for making earmolds.