Nullenbox
Focus deeper.
Without distractions.
Noise Box is a simple noise generator for deep focus or relaxation.
Android only
Noise Box
Simple noise generator
Four Sounds, Infinite Focus
Each noise color has unique acoustic properties. Choose the one that fits your mood and task.
White Noise
The universal maskerEqual energy across all frequencies. Engineered to mask background noise in offices, sleep labs, and studios.
Best for: Masking chatter, helping light sleepers, or studying in loud spaces.
Pink Noise
Nature's frequencyPower decreases with higher frequencies, matching patterns in rain, wind, and ocean waves.
Best for: Deep sleep, memory consolidation, long meditation sessions.
Brown Noise
Deep focus anchorA heavy bass rumble like a distant waterfall. Named after Brownian motion, not the color.
Best for: Deep work, reading comprehension, ADHD focus support.
Blue Noise
High-frequency energyThe opposite of pink noise. Bright and airy, emphasizing higher frequencies.
Best for: Staying alert during repetitive tasks, tinnitus relief, gentle morning focus.
Clean by Design
An app for focus shouldn't break your focus. No ads, no tracking, no subscriptions.
No ads, period
Background noise helps you focus. Ads do the opposite. No banners, no videos, no interruptions.
No tracking
Noise Box plays sound. That's it. No data collection, no analytics, no selling info.
Free because it works
White noise is a utility. Charging for it doesn't make sense. No premium tier, no locked sounds.
Why Ambient Noise Works
Noise generators work. Music grabs your attention. Ambient noise fades to the background. When a sudden sound breaks through, the contrast is smaller, so it's less likely to yank your focus away.
Each noise color works for different situations. White noise masks chatter and chaos. Pink noise sounds natural—like rain or wind. Studies link it to better sleep. Brown noise is the favorite for deep work and ADHD. It filters out high frequencies so you stay focused.
Blue noise is brighter. Originally used in audio and image processing, now people with tinnitus and those who need to stay alert use it. Four noise types, one app. Covers focus, sleep, and relaxation.
The Noise Box blog covers the research, guides for different uses, and tips for a focused setup.