Acoustic waves : devices, imaging, and analog signal processing

TL;DR: Overall, the overview demonstrates that ultrasound may compete with other technologies in the expanding market of biometrics, as the different commercial fingerprint sensors integrated in portable electronic devices like smartphones or tablets demonstrate.

TL;DR: In this paper, the authors extend for the case of Maxwell equations the \X-shaped" solutions previously found for scalar (e.g., acoustic) wave equations and discuss the appearance of the X-shaped solutions from the purely geometric point of view of the Special Relativity theory.

TL;DR: In this article, a dual-electrode bimorph piezoelectric micromachined ultrasonic transducers (pMUTs) was demonstrated by utilizing a two active AlN layers structure constructed in a CMOS-compatible process.

TL;DR: The theoretical basis for a testing tool in the form of a circular waveguide for measuring both the dynamic viscosity and the longitudinal bulk velocity of viscous liquids is presented and good agreement between theory and experiment was obtained.