The audio begins with a series of three distinct raps, echoing in the silence. It's the sound of a hand knocking on a door, its weight and tempo suggesting urgency. The knocks are slightly muffled, as if the door is heavy or thick, perhaps made of solid wood. The door is located in a specific spot, creating a unique reverberation in the audio. Each knock is distinct, with subtle variations in their intensity and rhythm, an artful use of foley to bring the scene to life.