Green Noise - Free Online | FunToolX
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Green Noise
Natural mid frequency, meditation
⚡ Web Audio API real-time synthesis, zero files
About this tool
Green Noise is a free online ambient sound player. Natural mid frequency green noise, relaxation and meditation. Perfect for focusing, sleeping, or relaxing. It runs entirely in your browser — no download or sign-up needed.
Green noise has the strongest energy in the mid-frequency band (about 500Hz-2 kHz), and is weaker at low and high frequencies. It sounds like the wind blowing on leaves, the rustling on the grass, or some natural environmental sound. You can adjust the volume and playback duration.
The generation algorithm is implemented by band-pass filtering white noise, retaining mid-frequency band components. The browser implements filtering through the BiquadFilterNode of the Web Audio API.
Suitable for relaxing, reading, and background sound at work. Green noise is believed to have a positive impact on attention and is suitable for scenarios that require long-term concentration. Can be mixed with other environmental sounds.
The green noise generator generates random signals with prominent mid-band energy, which sounds like natural environmental sounds and is suitable for relaxation and background sounds.