As the sister comment said, noise isolation is what you want. I live in an apartment with masonry walls and floors, and I basically cannot hear anything from my neighbours. The most I hear is tap tap tap when someone above is walking with heels on.

Now if you have any ideas for noise outside I'm open :-) A hipster bar opened opposite last year (when we moved in there was a commercial unit that had been empty for a few years, turns out it was a restaurant with alcohol license before), and we regularly have drunk people speaking loudly/shouting outside in the evenings from Thursday - Saturday. We can obviously close the window (triple glazed), but it's nice to have a breeze coming in.