iStatic

iStatic generates continuous visual and aural noise. Use it to mask distracting background sounds, when you're at work, reading on the train, trying to sleep, or if you just loathe silence.
True white noise can be quite harsh on the ears: set the Color slider to the exact shade you want for instant aural comfort, generated on the fly, without memory-hogging sound files.
FEATURES:
- White and colored noise over speaker or headphones
- Center frequency continuously variable from 100Hz to 20kHz
- Volume control
- Renders stereophonic or monophonic noise (stereo on supported devices or external speakers/headphones only)
- Continuous fullscreen random visual noise ("snow")
- Shake effect
- Inter-App Audio support: record or process noise with other apps
- Sleep timer: set the noise to switch off automatically after a specified interval, up to a maximum of 12 hours