My mother has a 50" LCD TV mounted to a common wall shared with another condo, and they've complained about the noise (though her TV volume is set at reasonable levels, and her hearing is good).
Living next to or above or below a neighbor who is clunking, clanking, yelling, or racing their toy fire truck across the floor at six in the morning is among the most maddening of New York City ...
We've recently moved from a rural area to a large city for my new job. The house we've bought is semi-detached and on a fairly busy road. There are also lots of neighbours nearby which we're not used ...