Blue Noise - Free Online | FunToolX
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Blue Noise
High frequency bright, boosts alertness
⚡ Web Audio API real-time synthesis, zero files
About this tool
Blue Noise is a free online ambient sound player. High frequency bright blue noise, boosts alertness and focus, great for work and study. Perfect for focusing, sleeping, or relaxing. It runs entirely in your browser — no download or sign-up needed.
The energy of blue noise increases with increasing frequency, and high-frequency components dominate. It sounds like a hiss, steam, or crisp water, which is sharper than white noise. You can adjust the volume and playback duration.
The generation algorithm is realized by differentiating white noise (difference between adjacent samples) to enhance high-frequency components. The browser side generates it in real time through the Web Audio API.
Suitable for blocking high-frequency environmental noise, testing audio equipment, or as a special sound effect. Blue noise is not very suitable for sleeping, but it can be used for certain focused scenes or sound experiments.
A blue noise generator generates a random signal whose frequency energy is proportional to the frequency. The sound is sharp and bright, similar to a hissing sound or steam sound.