白噪音NEW
白/粉/棕噪音助眠与专注
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AllFreeTool is a free online white noise generator that plays white, pink or brown noise to help you focus, sleep or mask distractions. You pick the type, set the volume, and choose an automatic stop after five, fifteen or thirty minutes. You can also download a ten second WAV sample of the same noise for use in your own audio project. Everything is generated locally in your browser.
It suits working in a noisy office, sleeping in a room with constant hum, studying, or masking sound while you record something else. Pink noise is often easier to listen to for long stretches, while brown noise sits lower in the spectrum and feels heavier. The timed stop is useful when you do not want it running all night.
Why use 白噪音 on AllFreeTool?
Three Noise Types
Choose white, pink or brown noise, each generated with a different spectral shape.
Automatic Stop
Set the playback to stop on its own after five, fifteen or thirty minutes.
Volume Control
Adjust the level to match the noise around you and keep it comfortable.
WAV Download
Download a ten second WAV sample of the selected noise for your own use.
How to use 白噪音
Choose the Noise
Choose white, pink or brown noise and set the volume you want.
Set the Timer
Choose an automatic stop, or leave it off to play until you stop it.
Play or Download
Press start to listen, or download a ten second WAV sample of the same noise.
Common questions
What is the difference between the three types?＋
White noise carries the same energy at every frequency, which sounds bright and even. Pink noise leans towards the lower end and feels softer and less harsh. Brown noise falls off more steeply and sounds deep and rumbling, which many people find easiest to sleep to.
How is the noise actually produced?＋
It is generated live in your browser with the Web Audio API, so the sound is continuous and there is no looping artefact you would hear from a short repeating sample. The downloaded WAV is a ten second excerpt of the same generator, written with a proper RIFF header.
Will it keep playing if I forget about it?＋
You can set an automatic stop for five, fifteen or thirty minutes and the playback ends by itself at the limit. The remaining time is shown while it plays, so you always know how long is left before it cuts out.
Is anything uploaded or downloaded from a server?＋
No network request is involved at any point. The noise is synthesised locally, and the WAV sample is generated in the page as well, so nothing is fetched from a server and no listening data is collected or stored.