Pink Noise - Free Online | FunToolX
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Pink Noise
Soft mid-high, like gentle rain
⚡ Web Audio API real-time synthesis, zero files
About this tool
Pink Noise is a free online ambient sound player. Soft mid-high pink noise, like gentle rain, great for study and work. Perfect for focusing, sleeping, or relaxing. It runs entirely in your browser — no download or sign-up needed.
Pink noise has equal energy in each octave, and the higher the frequency, the lower the energy. It sounds like the sound of waterfalls or rain, which is deeper and softer than white noise. You can adjust the volume and playback duration, and support background playback.
The generation algorithm uses the Voss-McCartney method or multi-layer random interpolation to ensure 1/f frequency characteristics. The browser generates audio samples in real time through ScriptProcessorNode or AudioWorklet of the Web Audio API.
Suitable for sleeping assistance, meditation, blocking environmental noise, and improving concentration. Research suggests pink noise may enhance deep sleep and memory consolidation. Can be mixed with other environmental sounds.
The pink noise generator produces a random signal whose frequency energy is inversely proportional to the frequency. It sounds softer than white noise and is suitable for sleep and concentration.