The short answer
Yes, white noise makes tinnitus less noticeable while it's playing. No, it doesn't reduce tinnitus, and the relief stops the moment the sound does.
That's not a reason to throw it out. It's a reason to be clear about what job you're asking it to do.
Used as a comfort, sound helps. Used as an escape, it slowly makes things worse.
Why it works in the moment
Tinnitus stands out most in quiet. In a silent bedroom there is nothing else for your hearing system to attend to, so the internal signal becomes the loudest thing in the room.
Adding a broad, even background sound narrows that contrast. The tinnitus is partially covered, and your attention has somewhere else to go. On a difficult night, that can be the difference between falling asleep and lying awake for three hours.
That's a real benefit, and it's worth having.
Why it doesn't fix anything
Tinnitus distress is driven far less by the sound than by your nervous system's response to it. Your brain has classified the signal as something to be watched, so it keeps handing it back to your attention.
White noise covers the signal. It doesn't touch the classification. The alarm is still armed — you've just put a blanket over the speaker.
This is why people can use maskers for years and be no less distressed than on day one. Nothing underneath has been asked to change.
The version that backfires
There's a difference between a fan you like having on and a machine you panic without.
If you can't be in a quiet room, can't sleep if the app fails, or reach for sound within seconds of noticing the tinnitus, then masking has become avoidance. And avoidance is the single clearest message you can send your brain that the sound is dangerous.
The more thoroughly you escape something, the more threatening it becomes. That's not a moral point — it's just how threat learning works.
How to use sound well
White noise, pink noise, or nature sounds?
There's no convincing evidence that one is better for tinnitus than another. White noise contains all frequencies at equal intensity and can feel harsh; pink noise is weighted towards lower frequencies and most people find it gentler. Rain, fans, and low broadband sound do the same job.
Choose whatever you can relax to. Comfort matters more than the spectrum.
What actually changes things
The goal isn't better masking. It's not needing to mask — being able to sit in a quiet room with the sound present and be fine, because your nervous system no longer treats it as an emergency.
That process is called habituation, and it's what ACT-based work is designed to bring about. It's the opposite direction of travel from masking: instead of covering the sound better, you learn you don't have to.
Keep the fan if you like the fan. Just don't let it become the plan.