Recently bought a semi-detached, 70's ex-council house. The walls are obviously quite thin and unfortunately the party wall is on the bedrooms and living room.
Next door are an older couple (not elderly, but older, I would say 75+). Haven't actually seen the lady but spoken to the gent a few times. He's v polite. Unfortunately they have their TV on SO LOUD! It doesn't matter in the day or early evening, as although you can hear it as well as our TV, you can still watch it. The problem is at night time as they go to bed late, it's often still on gone midnight, and DH and I get up very early for work. DH has politely asked them to turn it down in the bedroom after 10-10:30, and when I saw the gent outside his house a week or so later he said he'd gotten headphones to watch it - which I thought was the sweetest thing ever!
Problem is, it's still REALLY loud. I think we've concluded its actually in the living room at night when it's loud, which gives you an idea of how loud it is/how thin the walls might be. I can always hear the gent talking too.
Wibu to put a polite note through the door asking them to turn it down after 10pm? It's not a problem the rest of the time!