DIRECTIONALLY CONTROLLABLE PARAMETRIC EMITTER

摘要

An ultrasonic audio system includes an ultrasonic emitter having a plurality of electrically isolated sections and configured to emit an audio-modulated ultrasonic signal from each of the plurality of electrically isolated sections; a time delay module configured to receive audio content and to generate a plurality of audio content signals, the generated audio content signals comprising a plurality of individual instances of the audio content signal each instance differing in time relative to the other instances of the audio content signals; and communication links electrically coupling individual ones of the instances of the audio content signals to a corresponding ones of the plurality of electrically isolated emitter sections.