I have flown a bit over 3000 Hrs in the S92. The last 1000 approx using a Gallet helmet and ear normal plugs instead of the Gallet earplugs with speakers. I fly around 700 hrs a year up to about 7 hrs a day some days. I have no hearing problems at all. No tinnitus or major hearing loss since using the helmet. There was some hearing loss before, but it has not developed at all since. I have regular hearing tests to check. Not everyone likes wearing a helmet for comfort reasons, but I find it very comfortable and easy to use. It is a lot more comfortable than the old military Mk 4 I used earlier.