Prof. Jiří Erhart works at the Technical University of Liberec and at the research institute VÚTS, a.s. in Liberec, Czech Republic. He is the Head of the Piezoelectricity Research Laboratory at the Department of Physics and his reasearch interests are on piezoelectricity and piezoelectric materials, ferroelectric domains and domain engineering, piezoelectric ceramics transformers, resonators, and actuators. Petr Půlpán, Ph.D, work at the R&D ... Read moreMeasurements department, VÚTS a.s., Liberec, Czech Republic. His main research interests are in electromechanical properties of ceramics, design of piezoelectric transducers and actuators, and general acoustics and vibrations. Martin Pustka, works at VÚTS, a.s. Liberec, R&D Department Measurements, and is the Head of the NVH group. His primary research interests are noise and vibration measurement and analysis, structural dynamics, piezoelectric resonators and application of piezoelectric resonant structures. Show Less