Very confused about which dome to use with my Oticon OPN aids. I don’t know how to tell the difference between the various options, sizes, etc. The ones I was provided with fit well, but I’m not even sure they were meant for the OPNs. The ones I currently have have two small holes in the side, I assume these would be what are called “open domes”. Why would I want them vs closed domes which I assume have no holes.
Is there a nice simple tutorial on domes that will help me decide size, etc.?
Thanks for any advice.