Sludgy, abrasive, and punishing, Noise is everything its name promises, expanding on the music's capacity for sonic assault while almost entirely rejecting the role of melody and songcraft. From the ear-splitting, teeth-rattling attack of Japan's Merzbow to the thick, grinding intensity of Amphetamine Reptile-label bands like Tar and Vertigo, it's dark, brutal music that pushes rock to its furthest extremes. By the end of the '90s, a resurgence in the use of sine waves -- originally explored by musique concrète artists in the '50s -- became increasingly frequent among noise artists such as Otomo Yoshihide.