Newly built homes less sound-proof than old homes?
My old house you can't hear anything going on inside the home , nor can you hear your neighbor's idling vehicles.
I am not so sure whether it's due to so many windows put in my new house(lot more big&tall windows for every room, like most upscaled new house design) or simply the wall sound-proof materials are simply less optimal.
I didn't feel any draft, nor the new house seems to lose heat quickly in wintertime, so I supposed the wall were properly insulated(both sound and heat?).
My old house was built in the 1960s.