Parametric array loudspeakers exploit nonlinear acoustic phenomena to generate highly directional audible sound beams from ultrasonic carriers. This technology relies on the self-demodulation of ...

A newly declassified report by a panel of experts convened by U.S. intelligence agencies concluded that commercially available devices known as directional loudspeakers or acoustic lasers are the most ...

Imagine a loudspeaker beaming music at you, almost as if it were a beam of light. You hear the music loud and clear, but your friend sitting across the table hears practically nothing. While products ...

Portions of an ARM ‘button’ array (non parametric) for a DRONE BLASTR™ airborne drone. ARM attacks drones at acoustic frequencies. Patented and patent pending. Photo courtesy Fractal Antenna Systems, ...