When you hear "brain-computer interface," you probably picture surgery, wires and a chip in your head. Now picture something quieter. No implant. No incision. Just sound waves directed at the brain.

Engineers at the University of California San Diego have developed a wearable ultrasound device that can provide long-term, wireless monitoring of muscle activity with potential applications in ...

Researchers have developed a compact, wearable ultrasound device that monitors muscle activity. Attachable to the skin with an adhesive and powered by a small battery, the device wirelessly captures ...