It's called Widex Zen. Here's a sample: https://www.youtube.com/watch?v=GqWMa7fEH-4

I'm not sure if it's actually fractal like in nature (hence the quotes around fractal); it's just somewhat random tones that help distract your brain from the tinnitus sound. I like it, but in situations where my tinnitus is bad (quiet rooms) I usually opt to have music on instead.