Khol also called Mridang, is a folk drum of northeast India. It has a body made of clay, a very small head on the right side (approximately 4 inches), and a larger head on the left side (approximately 10 inches). A fiberglass version of the khol has become popular in the West among the members of ISKCON. It is very popular in the kirtans of Bengal, but it is also found throughout the northeast including Bangladesh.
Watch Mridang playing on youtube.com here.
Content taken from www.chandrakantha.com