The Hang (plural form: Hanghang) is a type of musical instrument called a handpan, fitting into the idiophone class and based on the Caribbean steelpan instrument. It was created by Felix Rohner and Sabina Schärer in Bern, Switzerland. The name of their company is PANArt Hangbau AG.

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 the shape of a convex lens. 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.

The Hang uses some of the same basic physical principles as a steelpan, but modified in such a way as to act as a Helmholtz resonator. The creation of the Hang was the result of many years of research on the steelpan and other instruments.

The name "Hang" comes from a Bernese German word that has a double-meaning, one of which is "hand" and the other "hillside" referring to its convex shape. It is a registered trademark and property of PANArt Hangbau AG.

More Info: en.wikipedia.org