Comment by Nux
White noise is key here. Luckily I do not have tinnitus, but I have small children and they sleep great with this on. And so do their parents, especially handy when going on holiday in noisy hotels etc. I can't go on holiday without it now! :)
I've just downloaded this audio track with yt-dlp, placed it on an sdcard and I play it in a loop on a small speaker.
This appears to be brown noise, not white noise.
I have no affiliation with this macOS app, but I use it for the same reasons you do. It's paid, but worth it IMHO. It generates the noise on your own machine, and you can pick what kind of noise you want to hear: https://apps.apple.com/us/app/brown-noise-ambient-noise/id15....