Audio spotlighting uses ultrasonic frequencies to create narrow beams of sound similar to laser beams of light. It works by emitting high frequency ultrasonic tones that are modulated with an audio signal, producing audible byproducts through nonlinear interactions with air. This allows targeted audio to be delivered to specific listeners without others nearby hearing it. Potential applications include targeted advertising, public announcements, emergency communications, and entertainment systems where individualized audio can be delivered without using headphones. The technology is still developing but holds promise to revolutionize audio delivery by allowing precise control over the direction of sound propagation.