The last time I wore my hearing aid was 7 years ago. I wanted to try it on today and I used to put it on 2 but today 2 was too loud for me. I know theres a hidden door and was wondering I could adjust the sound myself using those screws behind the door, instead of shelling out money.
Also the sound, sounds different doesn’t sound high quality; its hard to explain. Also what does that slider do, I know your suppose to switch it when you do diff thing e.g. talk on phone.
Oticon Personic 400
EDIT:I don’t think it is picking up a certain frequency.