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Audible Enclaves (AE) and Parametric Array Loudspeakers (PAL) Focus Sound: These technologies combat sound dispersion in noisy environments by creating focused sound beams. This ensures only the intended listener hears the audio.
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Audible Enclaves (AE): AE creates pockets of sound using two inaudible high-frequency waves. These waves interact non-linearly at a specific location to produce audible sound, offering privacy and personalized audio experiences.
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Parametric Array Loudspeakers (PAL): PAL uses modulated high-frequency ultrasonic waves to generate directional sound beams. These waves self-demodulate in the air, producing focused sound and minimizing unwanted dispersion.
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How PAL Works: PAL emits high-frequency waves modulated with an audio signal. As these waves travel, they self-demodulate, creating a narrow sound beam audible only to those in its path.
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AE’s Unique Approach: AE uses two inaudible high-frequency waves that, when they intersect, create audible sound only at that specific location.
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Applications: PAL and AE are useful in museums, retail, public spaces, entertainment, assistive technology, and security. They provide targeted audio without disturbing others.
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Published Research: A study published in Proceedings of the National Academy of Sciences highlights researchers’ success in creating audible enclaves using two high-frequency waves.
