N. U. Unruh (born Andrew Chudy on June 9, 1957, in New York City, U.S.) is a German musician, experimental percussionist, and instruments inventor, probably best known for his work with German music group Einstürzende Neubauten.

In 1980, Unruh co-founded the German band Einstürzende Neubauten, together with his school friend Blixa Bargeld.

Unruh usually plays self-constructed percussion instruments.

In 2000, Unruh released a solo album, Euphorie im Zeitalter der digitalen Informationsübertragung[1] ("Euphoria in the era of digital data transfer").

He is also a member of the band Bombus (not be confused with the Swedish band of the same name), which describes itself as "electronic dance music combined with drummers, performers, and DJs".