Anja Ulfeldt 250B
Giant Reverberant Object
The idea here is that there is some giant object that is very loud and people can throw things at it or play with things that are attached to it and bang against it. Pictured are a few ways to mount "balls" (I imagine rubber) to it so they can be used repeatedly without bouncing all over the room.
Some sort of pinball like shooting device where participants can fire balls at hanging/mounted resonant plates at different pitches. The balls then fall into a funnel and return to the shooter. Would probably be impractical unless contained in some sort of clear box with walls.
Balls are thrown in the top, they bounce off of hanging or mounted resonant bowls or plates, and then return to the front of the box so they can be dropped in again. The most important part would be that the bowls were pitched or rang well when struck by the balls. Contact microphone on a resonant plate on the back of the box?