Closing of a Heavy Metal Door

As the audio begins, the distinct sound of a heavy metal door is instantly recognizable. There's a deep, resonating echo that hangs in the air for a moment, implying the sheer weight and robust nature of this door. You can hear the smooth operation of metal against metal, perhaps the door's hinges, delivering an almost musical tone. Then, there's the finality of the door's closure, a firm, resounding thud that reverberates, signifying the door has been securely shut. The echo gradually fades away, leaving behind an intense silence.