Unfilled bricks and soundproofing - looking for experiences

I'm at . Concrete would also be an alternative.

I agree with . Concrete would also be another alternative

I thought of you and my boss, then I thought of my wallet and that I probably won't build a second house anymore.

never say never
I also only plan to build a single-family house for us once.

We have these bricks

May I ask which bricks you have exactly? Which brand, which exact type? And which bricks do you have for the interior walls? Do you think the disturbing noises come from the unfilled exterior bricks or rather from the interior walls? Thank you very much!

also have hollow bricks and am not impressed at all.

May I ask which bricks you exactly have (brand, type)?
Thank you very much!

T9 from Turber. I can’t say for sure, but by now I would just go with the filled ones, if only for the peace of mind so I don’t have to blame myself afterwards... Mass simply helps best against sound and knocking, just tap on such a brick... quite hollow.