I'm a developer. I've been coding for 40 years. You pick up opinions along the way.
One of mine was that "ambient noise for focus" was just something people said on productivity Twitter before going back to watching YouTube. Like cold showers and journaling — fine if you're into it, but not actual work.
Then one afternoon I had a deadline, a coworker on a Teams call three desks over, and absolutely no capacity to care about their sprint planning. My noise-cancelling headphones were dead. I had nothing.
I remembered someone had mentioned brown noise. Not white noise. Brown noise. The "deeper" one.
I pulled it up on YouTube, hit play, and expected nothing.
Fifteen minutes later I'd written 200 lines of code. The meeting next door had apparently ended. I hadn't noticed.
Here's what I didn't know at the time: white noise, pink noise, and brown noise aren't really the same thing. The names come from how the energy is distributed across frequencies.
White noise is flat — equal energy at every frequency. That's why it can feel harsh after a while, like standing next to a fan. Pink noise rolls off gently towards the higher frequencies. Brown noise goes even further — heavy on the bass, lighter up top. Like a waterfall, or heavy rain on a roof.
Your brain responds differently to each one. The deeper frequencies of brown noise are less fatiguing. For a lot of people, it's the difference between "I tolerate this" and "this actually helps me think."
The ADHD research is interesting here too. There's a theory that external stimulation — the right kind — can bring sensory input up to a threshold where the brain stops looking for stimulation on its own. The noise fills a gap. The brain settles.
I can't tell you if that's what happens to me. I can tell you what I notice when I work in silence: restless. What I notice with brown noise: not restless.
I built Quilence because the apps I tried were wrong in boring ways.
Loops that repeated every 20 seconds. Sounds that were clearly synthesized, not convincing. No way to adjust anything — just a volume slider and the option to "upgrade to premium." A ton of nature sounds I didn't ask for.
What I wanted was a noise generator that actually worked. 10-band EQ. Spatial Audio. The ability to dial in exactly the frequency profile that works for me. No birdsong unless I want birdsong.
That's it. That's the app.
Brown noise didn't fix my productivity. Nothing fixes productivity. But it removed a variable — ambient noise — that I'd never thought to control. Turns out controlling it helps.
Maybe you knew this already. Most people who use white noise have known for years.
I was late to it. Better late than never, I guess.