An alias used by Ivan Pavlov to put out experimental electronic music. Ivan Pavlov lives in Stockholm and issues his stuff on small cool labels in Europe. His records can be put close to the works of Coil (whom he's apparently a friend of, and cooperates with), Carsten Nicolai and Ryoji Ikeda. In his dry electronic pieces fulfilled with microscopic detail, COH explores the very nature of sound and its perception. His occupation as an acoustic engineer must also help in this.

Discography

Full releases

Enter Tinnitus (CD by Raster-Noton)
Into Memories of S-Tone (20' to 2000 series) (CD by Raster-Noton)
Vox Tinnitus (CD/2x7" by Raster-Noton)
Mask of Birth (LP by Raster-Noton)
Love Uncut (CD EP by Eskaton)

Split releases

raster-noton.(o)acis box (CD by Raster-Noton, together with komet, noto, byetone)

Compilations

Interiors (CD by Sentrax/Invisible Records)

Sources:
http://www.raster-noton.de
http://brainwashed.com/brain/

Caveat: if you value only melody and rhythm in music, you're probably not going to like COH.