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Noise Generator: White, Pink & Brown
White, pink and brown noise for focus, sleep or masking sound, with a timer.
Free tools that run in your browser. Nothing you type, open or create is uploaded to NerdBible or anyone else.
Stopped.
The noise is made by your browser from random numbers, with no sound files and nothing sent anywhere. It keeps playing when you switch tabs or lock a laptop screen; some phones pause web audio when the screen locks. With the sleep timer on, the sound fades out over the last 30 seconds and stops.
How to use it
- Press Play. Pink noise starts at a low volume.
- Move the White, Pink and Brown sliders to blend the colours, and raise Softness to take the hiss off the top.
- Pick a sleep timer if you want the sound to fade out by itself, or press Stop at any time.
Questions
What is the difference between white, pink and brown noise?
White noise has equal energy at every frequency, so it sounds bright. Pink noise loses energy as the pitch rises, about 3 decibels per octave, so it sounds more even to the ear. Brown noise drops faster, 6 decibels per octave, leaving a low rumble.
What do people use noise for?
Many people use it to mask background sound such as traffic, voices or a neighbour's television, or to help them focus in an open office. Steady noise makes sudden sounds less noticeable. It is not a treatment for any condition; if you have a health concern, ask a doctor.
Will it keep playing in the background?
Yes. It keeps playing when you switch tabs or minimise the browser, until you press Stop or the sleep timer ends. Closing the tab stops it. Some phones stop web audio when the screen locks.
How loud should it be?
Keep it low: just loud enough to cover the sound you want to mask. The volume starts at 30 percent for that reason.