type of sound or volume? - masking question

I wanted to ask your opinion - what matters for you when masking the sound of your T, is the sound type more important or is it volume?

I am back home after very long, extensive tests and one of them was measuring a level of my subjective T. Problem is, they tried to mask my T with some kind of a white noise that, simply put, did not work until it was very loud. As a result I was diagnosed with whooping 75 dB tinnitus. I cannot believe this test was accurate.

 

Fish -
When you use maskers, you don't turn them up to cover the sound of your tinnitus. You keep them at a volume lower than your tinnitus.

I don't recall having a test that measures the loudness of my tinnitus. Not quite sure how that can be measured.

 

You wear headphones, the doctor turns on a white noise and slowly raises it's volume. When you no longer hear your T, you need to press the button. Then it is repeated several times.

A second test was playing some tones at different volume and I had to say which is louder - my T or real tone.

But do you think such tests are accurate? I cannot believe my T could be that loud!