So the Mrs. and I were out on the weekend looking at some pretty nice new detached townhomes that had completely inground basements, with the exception of window wells. Pretty high ceilings down there, easily 9' maybe as high as 10'.

I've searched the archives here, and the web, but I can't find any discussions on the pros and cons relating to sound in below grade rooms.

Clearly there's limited sound transmission to the neighbours (a big plus in and of itself, I'm thinking), but is there anything else that should be considered? Apart from the obvious dimensions stuff. Rectangular rooms here; maybe 16 x 24 or so in one possibility, 19 x 14 in another.

Or is it just another room that would benefit from the regularly suggested treatments?