Let's say that I have a neighbor who has a big dog that barks at 80 dB. between him and me, there is a big wall, vegetations, etc. The sounds are absorbed, there is isolation so from my place what I will hear is a bark of only 60 dB.
Now, I also have a dog, exactly the same and it barks at 80 dB too.
If what I hear is 60 dB, does my neighbor hear 60 dB too from my dog? No matter what separates us? No matter the shape of the wall or its material ? is it always "symmetric"? I guess the answer is 'yes' but I'm wondering if it's so trivial
PS: If you have a better idea to the title of that question, feel free to edit
Since it's more a thought experiment, you should consider that the two dogs are twins