But there is one that reacts to movement and noises.
One? Several. Sensors with noise detection, movement via IR or RF, presence even without movement... all no problem with KNX.
Feel free to write a PM for more on the system topic
Why don’t you write it publicly? Your name somehow suggests that you want to sell something "different" ;)
As others have already said, in the long time I have been dealing with KNX, I have never come across anything that (assuming an interface) could not be integrated in some form.