Hi Sam,
Initially I had Mild Tinnitus and my audiogram was normal, a dip at 5db on 3khz and 4khz, after the vemp test it dropped to 30db on 4khz, however my T is nothing like yours (we have same hearing loss), mine is a blasting 8/10 and it can be heard over 90% of things. How long did it take for yours to reduce?