Randy Yau is a noise artist whos work is largely based around sounds from his mouth.
This is a particularly inventive performance of his which I saw the Knitting Factory this past May. In addition to his mouth, he introduces a few bunches of cellery to the mix. He has a contact mic strapped to his neck, two regular mics pointing around his face and mouth, and one sitting on the table in front of him.
He switches on a distortion pedal at some point towards the end but for the far majority of the sounds are clear, sharp amplifications of the sounds of his mouth crunching and slurping the cellery and its juices. There are, as far as I know, no elements of traditional musicianship involved but there is an excellent use of pacing and progression both in terms of sound and the performative elements.