Overtone singing as viewed through an X-ray. An extract from the material of INLAND, a film by Pierre-Yves Borgeaud.

This is performer Christian Zehnder expose as seen through xrays at the Dept. of Radiology at the CHUV Lausanne. An excerpt from INLAND, a filmby Pierre-Yves Borgeaud with Stimmhorn (2002). The DVD is available here.