"If one of these parts emits a key sound, would it not affect the whole expansive area with such a noise?"
"It might be possible, but such sounds should carry great pressure. Ordinary noises wouldn't make every floor feel this way."
"A loud noise? If there really is a loud noise, then we should be able to hear it or see it on the surveillance cameras, right?"
"That's why we aren't able to see this thing."
"If, and I'm just speculating here, we search layer by layer like this, do you think we'll find any clues?"
"I think it's pointless, and it's a waste of time to search like this. Moreover, by searching this way, we've likely already alarmed anyone who might be involved, and at this point, there won't be any findings."
"Do you mean that if someone really is interfering, every move we make here is also likely to expose us?"
"Yes, that's exactly it."
"Can't you block the surveillance camera?"
