A subgenre of doom steel and drone metal, that will be much more inaccessible and minimalistic than funeral doom. The sound is very sluggish, often being because sluggish as 10 beats a minute, and extremely heavy, with deafening, downtuned guitars. There was incredibly minimal drumming, and small performing. When there is singing, it is usually carried out in a shrieking way, like black metal. Drone doom is intended to envelop the listener into a soundscape without drawing attention to itself, just like ambient music. Examples of drone doom groups feature Earth, Sunn O))), and Khanate.