this approach does not produce high intensity and high signal quality bulk waves simultaneously particularly in the case of fibers in this invention the problem has been solved by placing a shaped ultrasound intensifier on a geometrically focused piezoelectric element by placing a suitable fiber or rod at the end of the intensifier or by making the rod or fiber an integral part of the intensifier very high density bulk waves are propagated through the fiber or rod referring to the drawing the piezoelectric element 10 has a curved shape defining convex and concave faces conductive coatings on each face comprise electrodes 11 and 12 the composition of the piezoelectric element may comprise lead zirconate lead titanate pzt lead meta niobate pmn polyvinyline difluoride pvdf composite pzts pmns and other materials characterized by the phenomenon of piezoelectricity abutting the electrode on the convex side of the piezoelectric element is a damping substrate 13 for controlling the pulse shape and power this substrate may comprise ceramic materials epoxies or rubber materials singly or mixed with ceramic and metal powders and other known suitable materials the piezoelectric element 10 and the substrate 13 are mounted in case 14 here shown as a metal case a socket 17 for a coaxial cable is mounted in the case 14 lead 15 and ground lead 16 connect the socket to the electrodes 11 and 12 respectively an ultrasound intensifier 18 abuts the ground electrode 12 and tapers.