I’m autistic with relatively high sound sensitivity. I’m wondering if another autistic person in this community used any soundproofing in an apartment that actually reduced noise coming from a busy street. There are a lot of different products out there and I don’t want to buy something that doesn’t work.
Not autistic but sound sensitive from time to time. Try a white noise machine. You can find ones that are tunable so you can find a tone that doesn’t trigger you. They can greatly help drown outside noise. You could get one for each room and create your own sound wall.
This app has some really nice soundscapes. (Plus white, brown, pink noise)
https://play.google.com/store/apps/details?id=com.mynoise.mynoise