I may sound like overgeneralising but this question has been in my head for so long.
I realise a lot of restaurants (even bars) in Germany are either playing music so loud that you have to yell to talk, or people round tend to speak really loudly as if they were sharing their conversations with the entire room, or both. If it is a Brauhaus, I understand, people are drinking. But even in cafés, or other supposedly quieter places, the volume climbs up quite quickly and naturally.
Another thing is when I am abroad, this effect also happens the other way round. You would easily find out German-speaking tourists since they speak really loudly. And when you notice so, they do not seem to care about how loud they have been either.
Am I just too sensitive?
I only recently realised this, as well. German bars are loud, maybe because Germans are generally speaking not and it help them get a little bit more out of themselves. Also it’s probably a privacy thing: The loud music makes it difficut to understand what people at the neighbouring tables are talking about. Hell, In most bars I don’t even understand the person sitting next to me.