I have a 7KHz hiss in my right ear -- probably due to my life as a helo pilot.... I do get relief by running a small fan in my bedroom -- the pseudo-random noise of the
fan seems to quiet the ear hiss. Another area to examine is ear wax accumulation. I prefer to monthly soak my ears with near body temperature almond oil. I heat some almond oil in the microwave oven until it almost matches my body temperature. Don't get it too hot! Lying down on your side, get a helper to instill a few drops of thr warm almond oil in the affected ear until the canal is full. Wait for 1/2 hour and then drain out the almond oil. Repeat the process with warmed hydrogen peroxide (3% solution, from the druggist), but allow it to stay in the ear canal for only 2 minutes. The flush GENTLY with warm water using a rubber ear syringe! This is the procedure used my M.D. (ear nose and throat specialist) -- she recommended I do it monthly. The procedure does relieve my tinnitus to a great extent, but it does not
completely cure it. Another benefit was an extension of the high end of my hearing. Before using these treatments my hearing had a severe drop-off at 12 KHz. After 5 months of these treatments my audiologist noted that the drop-off disappeared -- my hearing in both ears went out to 15.25 KHz with only a 3dB drop! She explained the improvement as being due to the removal of accumulated wax / gunk build-up on the ear drum. In short, the GENTLE and non-mechanical removal of the waxy gunk has allowed the ear drum to resonate at a much higher frequency!

WARNING NOTE -- before you try this procedure, PLEASE consult with a medical professional -- preferably a Medical Doctor who specializes in ear, nose and throat problems. This treatment works for me, but it may not be right for you.

Cheers!

Tim