Which interior wall material/wall thickness provides good sound insulation?

Hello, I want to dig up the thread from the past because the material mix also interests me. For the exterior wall, I am offered aerated concrete, Ytong. According to the offers, the interior walls are to be made of sand-lime brick. Is this mix bad? What wall thickness is recommended for the interior walls? For load-bearing walls, 17.5 cm and for non-load-bearing, 11.5 cm sand-lime brick are offered. Is the sound insulation sufficient at the specified wall thicknesses?

Hello,
We are also currently occupied with this topic.
Take a look at the Ytong website, there you can download the Ytong building manual. Chapter 5.5 deals with sound insulation and I found it very insightful.
By the way, the local Ytong prefab house partner at our location advised us against using SLB for interior walls. Reason: The climatizing properties of aerated concrete would be much better than SLB and thus increase the feel-good factor in the living spaces. Allegedly, similar sound insulation results could also be achieved with aerated concrete as with SLB. "It is also used in hospitals, etc." All that may be true, but with the same wall thickness, the story certainly does not add up for sound insulation. Maybe with double the wall thickness...

We have KS everywhere; if the children riot, I can hear it too - through the bedroom door. Otherwise: what should a manufacturer write? Have fun and call them and ask how the stone is air-conditioned - they probably mean the higher insulation value and the associated warm wall; of course, that's nonsense, since nobody (anymore) builds KS without insulation.

And then you lose living space again, which can quickly be 5-10m², with the same external dimensions and depending on the architecture...

We have aerated concrete (KS) everywhere; when the kids are making a ruckus I can hear it too - through the bedroom door
Otherwise: what should a manufacturer write? Have some fun and call them and ask how the stone is air-conditioned - they probably mean the higher insulation value and the associated warm wall; which is of course nonsense, since no one (anymore) builds aerated concrete without insulation.

Aerated concrete is supposed to be excellent for indoor climate...
When I compare it with other houses (old building, prefab house or aerated autoclaved concrete) I cannot find any disadvantages in our house regarding the indoor climate, rather the opposite compared to SOME houses.

KS is heavy and sluggish and has a high heat capacity => does not heat up quickly, does not cool down quickly. Otherwise, I also don't think that KS has any feel-good effect.

Exactly because of the inertia, the temperature does not change so quickly, which is quite pleasant. Recently we had a power outage all night, in the morning you didn't notice any difference in temperature. In a prefab house, it would probably be different in winter...