Originally Posted by
LondonElite
I suspect most people don't attach the same importance to this minor issue that you do. In any decent hotel they are two heavy double insulated doors that are as noise-insulating as a wall.
I also have this, what you call "minor", issue. I have found the vast majority of connecting door rooms, no matter how heavy the door, are simplier noisier. It's fairly simple that the doors allow more gaps for sound to travel through than a wall.
I find the hotels I stay at regularly (eg, Westin LAX) are very good at acknowledging this preference at check in. Hotels I do not stay in regularly never seem to acknowledge the preference. I have learned to always ask at check in if my room has a connecting door.