Hi folks I am a 40 year old ex international athlete who got mild tinnitus on and off after firing rifles in military career. I now own a geo drilling company and getting too close to the action the last year I noticed my hearing suddenly dropped a threshold 3 months ago. I took 3 weeks off to see ENT for all the tests, told only 5 % hearing loss right ear, 1 % left, mild hyperacusis right ear, mild tinnitus constant (didn't care then) but all scans okay. Went back to nightshifts with earplugs no probs but I guess the acusis made things sound louder and tinnitus suddenly jumped to high pitched whistle in right ear, mostly only noticeable at night. I quit site on the 3rd day and went back to the ENT who said to avoid loud noises for ever. Not after cures or treatments, however wondered what I might be doing wrong, as the sound has changed a couple times again in the last 2 months. High pitched whine is less but now changes tones, changes ears and also mixes in with general hissing behind the head. I am currently working from home and apart from on occasional screaming toddler things are quiet. I do notice however tinnitus reacts to different things. With the climate control humming or working in front of the computer the hissing comes on then, so I wonder if this is what created it and now it has stuck.