could the bangs and clicking noises be the vultures, birds "peck" constantly, could they be maybe pecking/hitting the walls or at anything moving.... the only way to even begin to understand or separate any noises from natural is to spend the night and make noises or movement to keep animal infestations at bay.... noise and movement shouldnt effect ghosts or spirit activity....dont think they will lay low or hide ...lol.... waiting to see also if they stayed overnight insideMaybe I missed it, but do you remain in the structure overnight as you are recording? If yes, do you hear the same sounds in real time as you hear on the recordings?