Ceiling height - What height have you chosen at your place?

Sound insulation is worse with blunt impact? Why is that?

Standard doors, so probably about 2.10. Width 1 m. For a walker or something in case needed.

Is soundproofing worse with butt hinges? Why is that?

Because of the missing rebate. The doors are simply smooth inside the frame. You can already notice that, I think... well... hear

Is soundproofing worse with flush-mounted doors? Why is that?

Because you have a gap all around, with normal doors you have a rebate all around. That makes a difference, we also tested it back then. Light also passes through flush-mounted doors. So actually, they only have disadvantages..

Except that in my opinion they look better. Thanks for your hints!

Apart from the fact that in my opinion they look better. Thanks for your comments!

Yes, they look good, but only from one side and unfortunately this is the wrong one. Namely the one the door opens to. Which door opens into the hallway so that you could see this good side there?

But probably a matter of taste. Additional cost about 60% compared to the normal door.