Ultrasonics refers to signals that are above the human hearing span (>20 kHz), and usually in the 40- to 70-kHz range. These signals are used like radar—they’re radiated toward a target and reflected ...

In 1918-1919 Walter G. Cady was the first to recognize the significant electrical consequences of the fact that piezoelectric crystals resonate at very sharp, precise and stable frequencies. Cady was ...

Peter A. Lewin, PhD, Richard B. Beard Professor of Electrical and Computer Engineering and Biomedical Engineering, received the IEEE Ultrasonics, Ferroelectrics, and Frequency Control (UFFC) Society ...

Most people are familiar with the telltale squeak of a mouse scurrying out of their pantry, but scientists have long known that these aren’t the only noises house mice make. During courtship, the ...