myNoise.net uses audio synthesis cleverness and the HTML 5 Web Audio API to give you a vast array of ambient soundscapes and background noises right in your (recent) browser. Each generator is highly customisable and users can share customisations with each other.
Hyperacusis is a condition where the slightest noise causes unbearable pain. It can result in phonophobia (fear of noise) and sometimes lead to suicide. Tinnitus is a far more common sound processing disorder, but severe cases can also lead to depression [autoplaying video] and suicide. The most serious threat to hearing comes from prolonged exposures to amplified live music (concerts). [more inside]