In Part 10 of my Horror Escape Game series in Unreal Engine 5, I build a full “dropping object makes noise” system so the ghost AI can react to the player’s mistakes. The idea is simple: when the player drops or knocks down anything—like a painting, kettle, plate, or random props—it creates a noise event, and the ghost will follow that noise location. I set up a Base Droppable Blueprint using an interactable base class, add a Pawn Noise Emitter, and use physics + impulse so the object actually falls and gets pushed in the direction the player is looking. Then I make the noise feel believable: I only trigger the sound on a real impact by checking Normal Impulse length (I use a threshold like 500), play an impact sound at the actor location, and call Make Noise so the AI can hear it. I also solve common issues I tested myself—like interaction blocked by wall collision, the player colliding with props, and the painting dropping from behind the wall—by fixing collision, setting Pawn to Ignore, and adding an “Is At Front” check using forward vector distance comparison. Finally, I wire the AI side: I store the Noise Location in the blackboard, switch the ghost state to Follow, and run an AI Move To task (with a small trick of switching to Lost first to avoid glitches).