Abstract: Advancements in ultrasonic imaging sensors (UISs), such as improvements in cost-effectiveness, low power consumption, and suitability for challenging environments, have been useful for drone ...

Abstract: Piezoelectric micromachined ultrasonic transducers (PMUTs) traditionally operate at a single frequency, requiring physical modifications to alter their operational frequency. In ultrasonic ...

College of Materials Science and Engineering, Sichuan University, 610064 Chengdu, China Department of Materials Science and Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 91058 ...

Ultrasound, or ultrasonic waves, are acoustic pressure waves that travel at frequencies of over 20 kilohertz (20,000 cycles ...