Yoko Ono - Screaming At Art Show.
I first heard this on the Jonathan Ross Radio 2 show and regard it as close to audio warfare as possible. Apparently, it's regarded as singing.
I now have to turn off the radio immediately if he plays it, which seems to be regularly. It sort of wedges into my brain and drives me mad.
https://www.youtube.com/watch?v=HdZ9weP5i68