If rain is soothing to you like it is to me, there are 8 hours of rain sounds on YT, could convert to MP3 and use for earphones or speaker.

White noise is a little like rain, but like rain hitting hard surface. I prefer pink noise, it is more like severe weather and without the sharp hitting sound. I'm the type that sleeps through thunderstorms....

My sensitivity comes and goes. Ticking clocks I could kill. But I have desensitized myself a lot, I talk myself into that some noises don't bother me. Of course it doesn't always work and then the head pillow comes in handy!!!

I'd like earmuffs to sleep with, slightly screening out sound, but I'm not sure how to make them comfortable to sleep with. I bet there is some online store for those things that I haven't found yet... since there really is a market for it.