Abstract Polyvinyl acetate (PVAc) composites were loaded with varying amounts of nano-metal alloy (Ag–Sn–Cu–Pt) and stearic acid. They are used as backing materials for ultrasonic transducers to prevent back-echoes from reverberating into the piezoelectric element reduce noisy echoes. The novelty this work is usage these newly prepared PVAc/alloy material in a polyvinylidene fluoride (PVDF) act...

A novel ultrasonic signal combination technique intended for applying in detection systems based on multiple transducers is presented. The technique uses a spatial combination approach that considers the specimen inspection from several apertures located in different planes. Information received from transducers is fused in a common integrated pattern. The proposed method improves the detection...

Background/introduction Transcranial focused ultrasound is emerging as a promising treatment modality for a variety of disorders including essential tremor and glioblastoma. However, traditional full-wave methods of simulating ultrasound pressure fields for these treatments, such as FDTD, are computationally intensive. The situation is exacerbated by the large area insonified by the transcrania...

The performance of transducers operating at high frequencies is greatly influenced by the properties of the piezoelectric materials used in their fabrication. Selection of an appropriate material for a transducer is based upon many factors, including material properties, transducer area, and frequency of operation. This review article outlines the major developments in the field of piezoelectri...

A novel type of half-concaved LiNbO(3) plate with domain inversion layer has been proposed for fabricating high-frequency broadband ultrasonic transducers. Two opposite ferroelectric polarization layers with a curved boundary are presented after heat treatment in the half-concaved LiNbO(3) plate with a total thickness of 110 μm. Characterization of the transducers illustrates that, without a ma...

This paper introduces Sonicstrument, a sound-based interface that traces the user‟s hand motions. Sonicstrument utilizes stereotypical acoustic transducers (i.e., a pair of earphones and a microphone) for transmission and reception of acoustic signals whose frequencies are within the highest area of human hearing range that can rarely be perceived by most people. Being simpler in structure and ...