Sure, if you always have these sounds then you should definitely take advantage of that fact. I think a lot of guys make their life unnecessary hard by trying to induce LDs strictly visually rather than acoustically.

Btw, I cant really use earplugs because when I have them in my ears they make these crunching sounds all the time which really distracts me from the inner sounds (maybe I should just get different earplugs..). Thats why I need a really quiet environment for this to work. Another problem that comes up is that sometimes I start to hear my heartbeat and it seems to get really loud. That keeps me from concentrating on the rushing and ringing sounds.

Well, I guess I still have to practice a lot more too, but it is definitely a way of WILDing that works and probably not the hardest one.