A Review of Acoustic Impedance Matching Techniques for Piezoelectric Sensors and Transducers

Piezoelectric Materials Used in Underwater Acoustic Transducers

The Effect of Electrical Impedance Matching on the Electromechanical Characteristics of Sandwiched Piezoelectric Ultrasonic Transducers

For achieving the power maximum transmission, the electrical impedance matching (EIM) for piezoelectric ultrasonic transducers is highly required. In this paper, the effect of EIM networks on the electromechanical characteristics of sandwiched piezoelectric ultrasonic transducers is investigated in time and frequency domains, based on the PSpice model of single sandwiched piezoelectric ultrason...

Design of a Broadband Electrical Impedance Matching Network for Piezoelectric Ultrasound Transducers Based on a Genetic Algorithm

An improved method based on a genetic algorithm (GA) is developed to design a broadband electrical impedance matching network for piezoelectric ultrasound transducer. A key feature of the new method is that it can optimize both the topology of the matching network and perform optimization on the components. The main idea of this method is to find the optimal matching network in a set of candida...

Broadband gradient impedance matching using an acoustic metamaterial for ultrasonic transducers

High-quality broadband ultrasound transducers yield superior imaging performance in biomedical ultrasonography. However, proper design to perfectly bridge the energy between the active piezoelectric material and the target medium over the operating spectrum is still lacking. Here, we demonstrate a new anisotropic cone-structured acoustic metamaterial matching layer that acts as an inhomogeneous...

Experimental Study of Acoustic Streaming Phenomenon Generated by Piezoelectric Transducers

The presented work is a study of acoustic microagitation, based on piezoelectric transducers, for being applied in microfluidic devices to promote mixing. The study comprises an experimental verification, by microscopy, of this phenomenon. It can be observed that the excitation of the PZT and β-PVDF piezoelectric transducers generates the fluid movement and creates patterns of recirculation, ac...