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

According to websites, Ytong 30cm wall + plaster should achieve about 46dB sound insulation, while 17.5cm calcium silicate brick has about 51dB.

From a purely logical perspective, I would assume that as soon as sound can pass through wall + window (if the wall "insulates too little"), the noises are louder than if only the window is the weakest link through which the sound passes. Although the human ear or brain would directly assume that the sound "comes from the window," simply because that is the largest source. Not much passes through the wall, but due to the large surface area, even very low "noise" would add up noticeably.

For example, 12 dB passes through the windows, 2 dB through the wall, resulting in a total of 12.xxx dB. This is my pure assumption from a logical point of view, as I am not an expert...

I also found a calculator that can compute sound sources with multiple levels. It seems to reflect my view:
12dB and 2dB result in 12.413dB.

Let's assume the window has 32dB insulation, the wall 46dB. Outside, there is a level of 75dB (car).
Through the window, 43dB passes; through the wall, 29dB. The combined levels would be 43.169dB according to the calculator.
However, the wall has a much larger surface area. So I assume:
1x 43dB + 4x 29dB = 43.64dB. If the wall has seven times the surface area, it would be around 44dB.

If a better window were installed, e.g., with 39dB sound insulation, it would be 1x 36dB + 4x 29dB = 38.547dB.

Of course, there are certainly some other factors that may absorb or reflect sound, etc.
It would be nice to have this explained by a forum member who is competent in this field.

If the invoice is correct like this, I really think it's great ...

43dB comes through the window, 29dB through the wall. According to the calculator, the levels add up to 43.169dB.

Why are the wall and window louder than just the window? How do you sum different sound sources without considering interference? Sound waves can amplify or reduce each other. Noise-canceling headphones work with interference by generating counter sound.

Why is wall and window louder than just window?

Because an online calculator said so - you don't want to claim that the internet would lie, do you?

Guys.. that’s why I explicitly and very clearly wrote that I have no knowledge of the subject and that I wish someone who is a professional in this area could write more about the assumption. I never claimed that it is like that.

So my pure assumption from a logical point of view. Since I am not an expert...

Of course, there are certainly some other factors that may absorb or reflect the sound, etc.
It would be nice to be enlightened here by a forum member who is competent in this field.

Please don’t read only half of the text carefully – I wrote it explicitly before and after because I never wanted to raise the expectation that this statement must be correct – it remains my thesis where I hope someone else will correct me.

Sound waves can reinforce or reduce each other.

I also mentioned that there are other factors which have not been considered here that can absorb or reflect the sound.

For noise-cancelling headphones to achieve this, ambient noises have to be recorded by microphones, processed in "real time," and an "anti-pattern" played back. This causes the externally coming noises to be "negated" for the human ear. A wall can’t do that so easily.
There have also been luxury cars for a long time that use something like this so that the interior becomes "quieter." Possibly something like this will also come for single-family houses. However, the "counter sound" has to be so exact that I currently don’t assume this. But again, I am not an expert and am happy to be corrected by others.

And please don’t come with the argument that if I have no idea, I shouldn’t write anything... As long as I/someone else writes that it is a thesis and not a well-founded statement, in my opinion it rather helps to get closer to the truth.

I hope I was able to clarify.

now I have looked into our construction folders Exterior wall with plaster, 42cm, filled with expanded clay, 53dB sound rating, U 0.18 W/m2K Window glass 36dB, the value of the building element window is not available, U 1.0, U glass 0.6, the house feels well insulated and quiet Regards Nida