Robbie Avenaim (born 1969 in Sydney) is an Australian musician, sound artist, and instrument builder. He is a drummer/percussionist, but extends his work through the use of found objects, junk percussion, contact mics and electronics. He formed noise rock band Phlegm with Oren Ambarchi in 1993, and toured the United States and Japan, including an invitation from John Zorn to play in New York. In 1994 Avenaim and Ambarchi founded the What Is Music festival, which showcases experimental music from around the world. Since the demise of Phlegm, Avenaim has released material in collaboration with artists such as Oren Ambarchi, Keith Rowe, Sachiko M, and Otomo Yoshihide, on labels such as Tzadik Records.