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.
A good pair of noise cancelling headphones is gonna be the easiest, cheapest option. You don’t even need to play music through them; just wear them and have them powered on with the noise cancellation on.