Hang Drum Art?

The Hang (German pronunciation: [haŋ], plural form: Hanghang[) is a musical instrument in the idiophone class created by Felix Rohner and Sabina Schärer in Bern, Switzerland. 

The instrument is constructed from two half-shells of deep drawn, nitrided steel sheet glued together at the rim leaving the inside hollow and creating a distinct 'UFO shape'. The top ("Ding") side has a center 'note' hammered into it and seven or eight 'tone fields' hammered around the center. The bottom ("Gu") is a plain surface that has a rolled hole in the center with a tuned note that can be created when the rim is struck.

Source: Wikipedia

The Joyful Art of Hang Drum