Researchers have developed a battery-free sensor that reacts to sound waves, such as particular spoken words, producing enough vibrational energy to power an electronic device. The novel sensor would ...

Many systems, such as tiny wireless-networked sensor nodes and low-cost calculators for the consumer market, have severely constrained power sources resulting from remote location, cost considerations ...

Active or passive technology can be used to isolate vibrations from equipment. By employing active techniques, opposite but equal forces are created electronically via actuators and sensors to cancel ...

Vibrations in the ground are found everywhere. They occur when cars pass by, when machines are operating, or when the earth’s crust moves. For most of us, these are invisible forces. For researchers, ...