I live in Japan. Small apartment, 42 square meters. We ripped everything out. My apartment walls are now the building's actual concrete walls. The screws that were embedded in the concrete walls... and held up the wood supports that sheetrock was screwed into are gone. (I don't know the technical terms, sorry.) This was also done to the floor. Tile was laid, directly onto the building concrete. Yet it is pretty even/flat.
But I think all sound, any sound bounces up
It's a three-story building. I live on the second floor.
All noise travels upstairs. No complaints from the people below me or on either side.
The space is basically divided into three areas separated by sliding doors and flimsy bookshelves.
Two of the spaces have a sheetrock ceiling that was attached to existing guiders (?) a steel framework. The ceiling in one space is the building concrete.
I am desperate to dampen sound leaving my apartment.
Would putting in regular insulation in the areas that have sheetrock ceilings help?
If it would... do I really really really have to tear the ceiling down to put in the insulation? ... or can I just cut a well-located spot to have access to the area behind the sheetrock (the gap above my sheetrock ceiling has got to be at least 12 inches) and do my best to gingerly JAM insulation in. Or am I just wasting my time?
OTHER POSSIBLE PLANS IF THIS ONE DOESN'T WORK
Current plan 1. Cut holes in my existing ceilings. Add insulation.
2. Get Green Glue and put up another layer of sheetrock ceiling.
3. Put up tin tiles on the new sheetrock... cause I will never get it to look right, and the tin may also block/prevent sound from leaking OUT of MY apartment.
And my neighbor will be able to sleep peacefully.
I am not a very good DIY guy. But I am not afraid to make mistakes.
Thanks for reading!