Researchers have developed groundbreaking technology allowing sound to bend and target specific individuals, making it possible to listen to audio without disturbing others. This innovation, designed by scientists at Penn State, could revolutionise entertainment, communication, and personalised audio experiences.
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The system utilises self-bending ultrasound beams and nonlinear acoustics to send sound to a precise location. Ultrasound waves, typically inaudible to humans, carry the audio through space and only become audible where two beams intersect. This means sound can be delivered directly to an individual without being heard by those nearby.
While technologies like parametric array loudspeakers already attempt to direct sound, this new method allows for much greater precision by bending sound waves using acoustic metasurfaces. This could enable practical applications in settings such as museums, libraries, or even cars, allowing multiple users to enjoy different audio without interference.
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Despite some technical hurdles, such as energy efficiency and sound quality, this innovation marks a significant step in sound control, presenting new possibilities for tailored and immersive audio experiences.
