Technical References
- Web Audio API — MDN: https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API
Frequently Asked Questions
Which sounds are available?
Geographic sounds include 24 options such as light rain, heavy rain, rain on a roof, streams, springs, drips into a pond, dripping water, ocean waves, forest wind, breeze, bamboo groves, pine waves, storms, thunder, waterfalls, campfires, snowfall, hail, rainforest, lake ripples, hot-spring bubbles, autumn leaves, summer-night ponds, and rainy-night insects; biological sounds include 25 options such as nightingales, cuckoos, sparrows, seagulls, owls, cicadas, crickets, katydids, frogs, wolf howls, whale song, dolphins, bees, mosquitoes, horses, roosters, dogs, cats, sheep, elephants, larks, thrushes, doves, deer, and seals — 49 in total.
Are the sounds recordings or synthesized?
All sounds are synthesized in real time in your browser with the Web Audio API — no audio files, no uploads, no external dependencies, ready the moment the page loads.
Can I mix multiple sounds?
Yes. The mixer at the bottom provides five tracks — rain, stream, birds, wind, and thunder — each with independent volume, plus one-click presets for a rainy night and a forest scene.
Is there a visualization?
Yes. A real-time spectrum visualization shows the frequency distribution of the current sound as a green gradient bar chart.
What is it best for?
Sleep aid, meditation, focused work, or creating a natural atmosphere — and for testing a speaker's low and high frequency response.
Technical References
- Web Audio API — MDN: https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API