OT, sound simulator related: I recall a thunder simulator (generator?) from years ago. You could draw/modify a “line” representing the ground surface, give it

OT, sound simulator related: I recall a thunder simulator (generator?) from years ago. You could draw/modify a “line” representing the ground surface, give it a few seconds, and it would output thunder. Early-ish internet days, Java applet. Might have been on a university web site. I tried searching fairly recently and came up empty handed. Is it possible that anyone here on HN might remember this and have a reference? I would settle for a paper.