Harsh noise is a specific type of
noise music that uses no (or minimal)
synths, no (or minimal)
acoustic instruments, and is created almost entirely by
electronic feedback and distortion, along with occasional
crashing metal sounds and aimless samples. Primarily from
Japan and sometimes referred to simply as "noise," the
term harsh noise came into use to differentiate its
style from more "musical" genres such as
noise rock and
noisecore, which use instrumentation and song structure.
It is closely related to
power electronics, but its focus is more on texture and
less about composition or feel.