Create a focused speaker so your music targets only the listener. That demodulates at 40 kilohertz, with an H-bridge and ...

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 ...

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 ...