In reply to jon:
> No, absolutely no warning at all. Mine started one day driving home from work and never stopped.
Same here. Started one day, with no obvious exposure to loud noises. Hasn't stopped since then.
After a few days, I went to the doc, and he could see some redness in my ears, indicating an infection. Antibiotics cleared that up, but not the noise.
I did wonder whether the infection made me more susceptible to noise-related damage; I'd spent the day helping a mate to shovel a load of earth around in his garden, so had been the regular sounds of shovel on concrete; not loud, but probably containing a fair bit of energy at the top end of the audio spectrum.
I'd had the usual ringing ears after going to loud concerts in my youth, but that rarely lasted more than a day. I can no longer risk going to concerts; too painful, and don't want to risk further damage.
It horrifies me when I see people working with power tools, etc, without ear protection. The worst thing I see is guys operating high pressure washers to clean chewing gum off the streets; a lot of energy at the top end (very 'hissy'). It hurts my ears just to walk past.
As for the maskers: I created a 'rain on a tent' model using PureData a few years ago. I used it to create a 45 minute MP3 that I could play at night, but then I found the MobMuPlat app that will run PureData scripts to generate the noise in real time. Recently, I have found the Atmosphere app that has a whole raft of noises you can play, and mix together.
For a few years, I've also been using radio plays and In Our Time podcasts to mask the tinnitus and internal thoughts that keep me awake.