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 ...

What is an ultrasonic pest repeller? Ultrasonic Pest Repellers are used as substitute for Mosquito coils and liquids to avoid inhaling of toxic fumes. It is the non toxic way to repel pests like ...

Radio-frequency (RF) control of an ultrasonic phononic crystal was achieved by encapsulating it in a composite of high k-10% KF-doped BaTiO 3 dielectric nanoparticles with poly(N-isopropylacrylamide) ...

Commercial devices that produce ultrasound frequencies are not promising tools for repelling bed bugs, according to new research. Alternative means of controlling urban insect pests by using ...