Of course. I could hear the thoughts of everyone in the city, if I so wished. [He waves a hand.] I didn't have control over it at first, but it didn't take long to figure out how to filter it all out.

[Granted, he'd had an awful headache for a week or so.]

Noise are made from Soul energy, actually. They simply instigate negative emotions. While they exist in both the UG and the RG, the only plane they're physicaly physically present on is the UG. They're more like spirits on the RG, possessing people and drawing out their negative feelings. Normally, people can't see them at all. It takes a special natural talent to be able to see the UG from the RG.

[He pauses for a moment, considering.] There isn't any Soul energy here because people don't die here. Not in the normal sense, anyway. It's present in those living here, sure, but there isn't a way to tap into it to create Noise. [Not that isn't taboo, anyway.] Because the Animus hold the souls of the dead and place them back where they belong, it doesn't really work the same as it does at home.

[... and that question gets a little smirk, and a bit of silence as Joshua glances away. He'd normally be evasive, but... well, it's Ryoji. It isn't like it will hurt anything.]

I haven't needed to use it in a long time.