sculk sensors can detect sounds through fully enclosed walls.

I was looking for the ancient city to check out the patch from 1.19.40 that fixed the mobs spawning at the outskirts of the ancient city. As i was looking for that I started to notice that the sculk sensors were detecting me through walls so i started doing some experimenting and i built a box around a skulk sensor with deepslate and it was detecting the sound of my jumping through the box.

 

Video:    https://1drv.ms/v/s!Akboo6i0o8sea9Xpfbnvx2h4Qnw