This was the inspiration for the kazoo, a membranophone. It is classified as a membranophone. A paila criolla is a Cuban membranophone. A tenor drum is a membranophone without a snare. Conical drums are a class of membranophone, or drum, that is characterized by sloping sides. The sarronca is a Portuguese traditional musical instrument, more precisely a rubbed membranophone. Hourglass drums are a sub-category of membranophone, or drum, characterized by an hourglass shape. The African djembe-wassolou is also a goblet membranophone. The sambal is a folk membranophone instrument from Western India. "Water drums" are also sometimes treated as a distinct category of membranophone. It is thus a membranophone of the kettle drum variety. The tumdak' is a hand-struck double-headed membranophone of the Santal people of India and Bangladesh. The maram is a membranophone percussion instrument from South India. The drum is a membranophone made with goat skin and played with the hands. In the Hornbostel-Sachs classification system, it is a membranophone.