I've seen a few:
John Duncan in an old factory building in Florence : big pressed carboard "rooms" connected by lots of colored pipes. Some were spreading sound from some hidden dvd or cd player, other could be used by visitors.
Throbbing Gristle with some artist i don't remember at Centre Pompidou in Paris : some mirrors/speakers hanging from the ceiling, with guitar feedback and various field recordings. Volume was definitely too low to be appreciated.
A Rauschenberg piece at Centre Pompidou in Paris : a bunch of junk metal with some kind of engine. A pedal can be pushed every 7 minutes, to obtain shaking and rattling noise from the sculpture.
An artist i don't remember at Venice Biennale ages ago : a big room with a lone amp, microphone and wires hanging on some water. Just a bunch of buzzing sounds and a few feedbacks, and the remote danger of electric shock. I think the artist was from Brasil.
None of these were too exciting, except the John Duncan one that at least had good sounds.