Wow. Sounds like you have a structurally sound listening room.
Hi persisting1 and all Audio Circle members.
Most of the houses in Vietnam are built that way,
I mean armored concrete,
of course depending on the size of the house the thickness of the floor/ceiling varies.
Mine is about 12" thick.
The walls are made of one or two layers of soft red bricks with a thin layer of cement and some plaster to smooth the surface before painting.
So noise don't come in or go out.
My listening room is just above our bedroom and even when playing my sound system full blast my wife can't hear a thing, even the deep bass from my V1 does reach the bedroom.
That's what I call sound proof.
On the other hand, with all the concrete my listening room is very echo,
I had to installed some drapes (Curtains) and other stuff to reduce reverberations.
It's much better now, but to complete the room treatment I would need some bass trap, diffusion and absorbtion panels, but since I will be staying in Vietnam only for a year or two, no need to spend money on that,
I will live with the present acoustic of my listening room.
Yesterday, I moved by V1 from the shortest wall to the longest wall and seems to me that the sound is a little better.
Well thanks for your comments, they are always appreciated.