Reddit mentions of The Ringing Sound : An Introduction to the Sound Current

Yes, I do practice it. If you have any questions, I would be happy to help you out. Many years ago, when I was sick, I heard the, at the time, annoying sounds in my ears. But I was so sick I could only surrender to it, and become one with it. Then I drifted into a blissful sleep and had the most amazing dreams where I heard music like I had never heard before. Then I googled for sound, ringing sound, etc. and found a lot of useful information. My first suggestion is to trust yourself and follow your own inner knowing and guidance. Of course, there will be teachers, interesting texts,... but if you can have direct experience without any middleman, why would you? In any event, try to google for Sound Current, The Ringing Sound....

Here's a book about it: https://www.amazon.com/Ringing-Sound-Introduction-Current/dp/0966535804

And here's even a guy who wrote a whole book about it (a science fiction story): http://soundcurrentrider.com/SoundCurrent.html

All every interesting... but in the end, I would advice you to trust your own experience, and not to push anything. Just let it all come naturally :-) If you have any question, just let me know!