I have a different experience with this tinnitus phenomenon when it comes to connection to higher dimensions (as the AAs said, there are other reasons that one might experience this and that is what I am sharing--I am not contradicting them). I experience it 24/7/365 as how I sense the energy signature of my soul partner Sitara. I first "heard" it on June 1, 2020, which was the one-year anniversary of Lindsey (her last incarnation) and I meeting, and about 6 weeks after Lindsey died--we had arranged with permission of her and my guides for us to spend our anniversary together. I write about my tinnitus here: https://medium.com/flowers-of-inspiration/12th-step-1st-step-conscious-contact-with-heaven-8854ae714389