How To Listen Through Walls Without A Glass. In england, for instance, a man rescued his elderly neighbor from a robbery by listening through the wall with a glass.11 x research source in his situation. Sometimes you want to hear what's going on in the room next to you without entering the room.
Any object subjected to vibrations can act as a membrane.
Pixel lighting by itself doesn't change the fact that lighting is computed on surfaces without regard to other objects; You'd also need to do this without any internal bracing between the inner and outer wall because that would transmit vibrations. How do i get the light to stop passing through the wall? I suggest you do not use this for listening in on other folks conversations, as in nearly all cases this is highly illegal.