Advantages of voice reproduction and the development of a biomimetic self-regulating double-clack valve for a prosthesis of the larynx - a feasibility study. - Fridun Nazaradeh; Marc Andre Dupre; Thomas Dörge; Claus Eckermann; Wiebke Kelterer; Denis Nazaradeh; Siegfried Steltenkamp (EMBC, 2012)