As the audio unfolds, the sharp, distinctive sound of knocking reverberates through the space, a rhythmic throb that echoes ominously. The source is a locked, wooden door in an otherwise silent room. The pounding and thumping grow more aggressive, each strike a startling reminder of the barrier between the listener and the unseen entity outside. The insistent knocking takes on an eerie quality, evoking images of a relentless zombie, ceaselessly seeking entry. The relentless, persistent sounds suggest an escalating urgency, creating a palpable tension that permeates the room. The audio is a chilling blend of suspense and anticipation, the pounding on the door serving as a stark reminder of the potential danger lurking just outside.