Quick sketch of a door bell:
I didnt include any kind of scale but the space is two stories high so you can imagine the form to be at its widest part about 16 feet tall.
The space is a warehouse loft and the client wants a low profile piece againts the wall which "does something". We thought it would be good comedy to make it a huge door bell which bellowed out some mega low rumbling note every time a guest would arrive and push the button at the door.
It will work just like an organ pipe with compressed air blowing over a carved reed or an edge, and the volume of the shape would resonate, and rattle the ceiling joist and knock the other paintings off the wall. *grin
We suspect it will not fly, but eleminating bad ideas is still progress.