White Noise
Constant power across all frequencies. Ideal for masking distracting speech.
FREQUENCY: HIGH
Sounds and Timers for Deep Work
Six colours of noise, six ambient recordings, four binaural presets and a Pomodoro timer — layered how you like, in one tab.
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Sound Library
Calibrated frequencies for deep work and relaxation.
Color Noises
Continuous frequencies for auditory masking.
Brown Noise
Deep, bass-heavy rumble reminiscent of a distant waterfall or thunder.
FREQUENCY: LOW
Pink Noise
Balanced spectrum that sounds more natural to the human ear, like steady rain.
FREQUENCY: BALANCED
Red Noise
Even deeper than Brown noise, focusing heavily on the low-end spectrum.
FREQUENCY: LOW
Black Noise
Near-silence with subtle low-frequency drift. Meditative, like the sound of a quiet room at night.
FREQUENCY: NEAR SILENT
Grey Noise
Psychoacoustically equalized to sound equally loud at every frequency.
FREQUENCY: EQUALIZED
Ambient Sounds
Natural soundscapes recorded in high fidelity.
Rain
Gentle rainfall creating a natural, soothing atmosphere perfect for deep concentration.
SOURCE: RECORDED
Rain on Tent
Rainfall on a tent canvas — cozy, immersive and deeply relaxing for focused work.
SOURCE: RECORDED
Ocean Waves
Rhythmic ocean waves rolling onto shore — a timeless natural soundscape for calm focus.
SOURCE: RECORDED
Wind
Steady breeze flowing through open spaces — airy and expansive for clear thinking.
SOURCE: RECORDED
Forest Stream
A gentle brook flowing through a quiet forest — peaceful and grounding for deep work.
SOURCE: RECORDED
Meadow
Birds and insects in a sunlit meadow — warm, organic ambience for relaxed focus.
SOURCE: RECORDED
Binaural Beats
Brainwave entrainment through stereo frequency offset. Layers with any noise above.
Headphones required for binaural effect
Delta
Deep sleep and healing. Ultra-low 2 Hz beat for total relaxation.
BEAT: 2 Hz
Theta
Meditation and creativity. 6 Hz beat for deep introspection and flow.
BEAT: 6 Hz
Alpha
Calm focus and learning. 10 Hz beat for relaxed concentration.
BEAT: 10 Hz
Beta
Active thinking and energy. 14 Hz beat for alertness and problem solving.
BEAT: 14 Hz
What this is
FocusNoise is a single-page audio tool for working, studying and sleeping. The colour noises are generated live in your browser with the Web Audio API rather than streamed, so there is nothing to download and no loop to notice however long you leave them running. The ambient recordings are cross-faded against themselves so the seams do not show, and the binaural presets are rendered as exact stereo pairs.
Everything layers. A colour noise, an ambient recording and a binaural preset can all play at once, each with its own volume, and the timer runs independently of all of them. No account, no paywall, no ads in the audio.
Colour noise
Mathematically generated, endless, and the strongest maskers here. Start with brown for long sessions or white if the problem is people talking.
- White noise — even energy everywhere, best against conversation
- Brown noise — deep rumble, the usual choice for long focus blocks
- Pink noise — the balanced middle, close to steady rain
- Red noise — deeper than brown, almost pressure
- Black noise — near-silence with a slow drift
- Grey noise — equalised so every frequency sounds equally loud
Ambient recordings
Real soundscapes for when synthetic noise feels sterile. Every one loops seamlessly and can sit over a colour noise for extra weight.
- Rain sounds — steady rainfall, the most reliable of the set
- Rain on a tent — closer and more percussive
- Ocean waves — slow surf with a natural rhythm
- Wind sounds — open ground, dry and spacious
- Forest sounds — a stream running through woodland
- Meadow sounds — birdsong and insects in open grass
Binaural beats
Two tones, one per ear, and a beat that exists only in your hearing. Headphones required — through speakers the effect disappears entirely.
- How binaural beats work — the mechanism, and what the evidence does and does not say
- Delta waves — a 2 Hz pulse, slow enough to count
- Theta waves — 6 Hz, for open-ended and meditative work
- Alpha waves — 10 Hz, the preset to try first
- Beta waves — 14 Hz, for analytical work with edge
Timers
A plain countdown that stops playback when it ends, and a full Pomodoro timer that runs focus and break rounds with a different sound for each phase.
Guides
Longer pieces on getting a setup that actually holds: brown noise for focus, white noise for studying, rain sounds for sleeping, and the background on why any of this works.
Common questions
Is FocusNoise free?
Yes, entirely. There is no account, no trial, no paid tier and nothing held back — every sound, every timer and the whole Pomodoro cycle are just there.
Does it work offline?
The colour noises and binaural presets are generated in your browser, so they never needed a connection. Install FocusNoise from the browser prompt and the whole app works offline; ambient recordings are cached after their first play.
Can I play several sounds at once?
Yes. One colour noise, one ambient recording and one binaural preset can play simultaneously, each with its own volume slider, plus a master volume in the player bar.