Need second opinion for EChocG.

Hello, I have tinnitus problem in my Left ear for last 20 years. I have managed to live with it. Due to narrow ear cannal, I had undergone a surgery in my Left ear to expand ear cannal in year 2011. For some time after the surgery my hearing improved, but gradually after an year or so it again became bad. I have mixed moderate hearing loss in my Left ear. My primary hearing ear has always been the right year. From past some time, I have started getting tinnitus in my right ear as well, and this is causing a great disturbance to me. I have seen a few doctors, but none has been able to cure this problem. Now I have reached a doc in Apollo hospital and he suggested PAT and other tests to me. After getting those done, he has asked me to go for Electrocochleogram. As this is not a normal test, I wanted to know what would be the use of getting this test done. I have attached my audiometry test done recently and an year back. please suggest if i am on right track of treatment. thanks.