Poroton (36.5 cm) versus lightweight expanded clay aggregate solid wall (41 cm)

We have a 36.5 cm Poroton wall (Wienerberger T10, unfilled).

So a cascade of regularly arranged resonators.

One could also call it that

So we have filled the Bellenberg MZ70 with mineral rock wool. Not plastered yet. Windows with slightly increased sound insulation 39db. I stood in the shell construction yesterday and thought what is that constant whistling sound... until I realized that the environmental noises probably are no longer enough to drown out my age-related tinnitus! Just kidding, compared to the 40-year-old hollow brick construction with double glazing and a lot of the builders' own work (I say this because surely some things are not connected very professionally) it is incredibly quiet in our shell construction. But sound is also very subjective.

A cascade of regularly arranged resonators then.

But it is a difference whether you are talking about the sound inside the house itself, for example a sound source audible on the ground floor in the upper floor: this should actually be prevented by the concrete ceiling in between or by the sound from outside to inside... yes, the hollow brick is not the best but it does provide 40dB... building with filling and then installing 32 dB windows is not well thought out... everything should fit together, therefore my predecessor did everything right... I am surprised that the opinion about the filled bricks is spreading so slowly, if they are so bad... with Ytong you can find a lot just by googling, with the unfilled ones rather less

We have a 36.5 cm Poroton wall (Wienerberger T10, unfilled). The inside is already plastered, the outside not yet. So far I don’t have the feeling that it is very soundproof. Conversations can be heard well outside the house and singing easily on the other side of the street. I wouldn’t blame the windows (triple glazed) or the front door (heavier aluminum variant)...

Ear held to the brick? When someone sings outside where does it come from Then inside? Triple glazing you always think is great... everyone looks at the thermal insulation... A standard triple glazed window has worse sound insulation than double glazing...

Yes, with Poroton you don't actually hear that often that sound insulation is problematic. I would like more information from as I will also be building with Poroton 36.5 soon.

yes, the hollow brick isn’t the greatest but it does provide 40dB ...
building with infill and then installing 32 dB windows is not well thought out ... everything should fit together, that’s why my predecessor did everything right ....

You are basically right when it comes to sound insulation (there are other reasons for with or without infill).
But one must not forget that sound does not occur at a single point but over a surface. Simple addition and subtraction is too simplistic with sound.
I’ll phrase it as a question:

Two identical houses. Same windows with 32 dB.
House 1 wall 40 dB
House 2 wall 46 dB

Everything else executed identically.

Are both the same in terms of sound or not?