'Telepathy' device allows communication 30 meters away

Researchers have created a device that lets someone whisper to another person up to 30 meters away. The wearable device uses ultrasound to beam a person's words directly to a specific person, without anyone else hearing what's being said. While the device is still in its prototype phase, the researchers say that it could be used to help soldiers communication discreetly. The ultrasonic speaker system can be configured in two different ways: Ultra band (A) and sonic chest (B). The ultra band system consists of a bent surface with 12x5 ultrasonic speakers worn on the forehead.