Online Tool Store
Sleep Sound Mixer
Mix rain, wind, and low-frequency ambience at independent levels with a fade-out timer, designed for masking noise while you sleep.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Audio
Sleep Sound Mixer
Frontend preview — no upload or external service.
Mix settings
Rain at 60%, low rumble at 35%, wind at 15%, fading to silence over the last 10 minutes of a 60-minute timer.
How the Sleep Sound Mixer works
- Choose the layers you want and set each level independently.
- Set a fade-out timer so the sound is not playing all night.
- Keep the overall level just above the noise you are masking, not louder than it.
The method
Masking works by raising the noise floor so intrusive sounds no longer stand out against silence, rather than by drowning them out.
effective masking needs roughly the masker within 5-10 dB of the intruding sound, not far above it
A neighbour's television at a low level is masked by rain a few decibels louder — pushing the rain much louder just replaces one disturbance with another.
FAQ
Is sleeping with sound every night harmful?
At a low level it is generally considered fine, but sustained loud playback close to the ears is not. Keep it quiet, use a timer, and give your hearing silence for part of the night.
Why rain rather than pure white noise?
Broadband natural sounds carry the same masking benefit with less of the harsh high-frequency hiss that makes pure white noise tiring to listen to.
Does it keep playing if my screen locks?
Browsers often suspend audio on a locked screen. If it stops, keep the tab in the foreground or use a device that allows background playback.
How we compare
| Feature | Online Tool Store | A DAW | A streaming app |
|---|---|---|---|
| Independent layer levels | ✓ | ✗ | ✓ |
| Fade-out timer | ✓ | ✗ | ✓ |
| No account or ads | ✓ | ✓ | ✗ |
| Works offline once loaded | ✓ | ✓ | ✗ |
Sleep Sound Mixer is deliberately conservative about level — masking works just above the intruding sound, and louder is not better for your hearing.