Optimal Phase on Biaxial Driven Transducers Based Only on Electrical Power Measurements

The biaxial driving technique enhances the mechanical response of a piezoelectric actuator by dephasing two orthogonal electrical fields to the propagation and lateral electrodes. This paper presents results on the relationship between the electrical response and the phase at which the maximum acoustic efficiency was reached on a single element biaxially driven ultrasound transducer. Eight air-backed biaxial transducers $(6.4\ \text{mm}\times …