Noise Generator
White, pink, and brown noise all sound superficially similar but have genuinely different frequency characteristics, and picking the one that actually works for your specific use (falling asleep versus blocking out office chatter) makes a real difference. This generates all three, useful for sleep, focus, or general sound masking.
Master Volume
50%White Noise
Flat spectrum, equal energy at all frequencies
Pink Noise
Gentle roll-off, natural and balanced
Brown Noise
Deep rumble, strong low frequencies
Suggested uses
All noise is generated in your browser using the Web Audio API. No audio files are downloaded. Pink noise uses the Paul Kellet refined filter; brown noise uses a leaky integrator on white noise.
How to use the Noise Generator
- Select the type of noise you want: white, pink, or brown.
- Press play to start the noise.
- Optionally layer additional noise types for a custom sound blend.
- Adjust the master volume to your preferred level.
- Press stop or close the tab when you are done.
White, pink, and brown noise aren't the same thing
White noise has equal energy across all frequencies, which is why it sounds like a harsh hiss. It's effective for masking a wide range of sounds but sometimes described as fatiguing over long periods. Pink noise reduces higher frequencies relative to white noise, producing a deeper, softer sound many people find more pleasant for sleep, and some research suggests it may be associated with a positive effect on sleep quality for some people. Brown noise reduces high frequencies even further, producing an even deeper, rumbling sound some people prefer for masking low-frequency sounds like traffic or HVAC systems specifically. There's no universally "best" one. The right choice depends on both personal preference and what specific sound you're trying to mask.
Frequently asked questions
Which noise color is best for sleep?
It varies by person. Pink noise is frequently preferred for its softer character, but individual preference genuinely differs. It's worth trying more than one to see which actually helps you personally rather than assuming one is objectively correct.
Can I set a sleep timer to stop the sound automatically?
If a timer is available, set it to your intended sleep duration so the sound doesn't play all night unnecessarily. Check the tool's settings for a timer or auto-stop option.
Does the sound loop, or is it continuously generated?
True noise generation (rather than a looped audio file) produces continuously varying sound with no repeating pattern, which avoids the subtle "loop point" some people notice and find distracting in shorter looped ambient tracks.
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