I have had Kirkland Signature 8.0 HA’s for about 3 months now. The right one has always worked quite well and the left one not so good. The loss is significantly worse on the left. I started out with vented sleeves in both ears, then tried unvented sleeves in both ears. The issue of what appears to be feedback around 3-4 kHz at higher ambient noise levels and high amplification levels remains in the left ear. I use the Own Voice Processing feature of the HA’s and do not find the occlusion effect with the closed sleeves that bad. Not an issue for me. My left HA has the gain tweaked back some from the REM gain that is said to be ideal. This is to make them tolerable to use with the feedback minimized.
From some research I see that the vented sleeves have two vents that are said to be equal to >4 mm diameter x 16 mm long. The closed sleeves are not really closed and have a single vent which is .8 mm x 4 mm and said to be equivalent to a 1.6 mm x 16 mm vent.
The Connexx software which I have installed says that I need a Click Mold Short in these sizes:
Right Ear: 2.5 mm = medium SAV
Left Ear: 1.3 mm
- What is calculated for a vent in the Left ear seems to be larger than what I currently have in my closed click sleeve if it is not 16 mm long. True, or is it really 16mm? Is it going to help or hurt with feedback?
- Should I get an earmold in just the left or both ears?
- What material should I get? I have read that the softer silicone offers the most acoustic isolation.
- What type of earmold would be best? Canal lock or ??
Thanks for any help you can provide. I am getting a bit tired of all of these changes and fittings, and would like to get it right this time…
Edit: I should clarify that I am not asking this so I can tell the fitter what to do. I am just assuming there may be options in what she can do, and I want to be able to select the best ones.