TK Electrical engineering. Electronics Nuclear engineering 10 Piezoelectricity 6 Transducers 6 Ultrasonic transducers 5 Piezoelectric transducers 4 Electric sensing devices 3 Energy harvesting 3 Hall effect transducers 3 TP Chemical technology 3 Ultrasound transducers 3 energy harvesting 3 ultrasound 3 Acoustic surface wave devices 2 Acoustic waves 2 Defects 2 Field effect transistors 2 Hall sensor 2 Liquids 2 MEMS 2 Measurements of 2 New approaches 2 Ocean currents 2 Piezoelectric ceramics 2 Piezoelectric sensors 2 Proteins 2 Surface acoustic waves 2 TA Engineering (General). Civil engineering (General) 2 TJ Mechanical engineering and machinery 2 Ultrasonic applications 2 sensors 2