Researchers at Pohang University of <a href="https://www.mid-day.com/mumbai/mumbai-news/article/mumbais-wilson-college-marks-national-science-day-with-interactive-exhibits-for-school-students-23618900" target="_blank" rel="none noopener">Science and Technology</a> (POSTECH) have designed MiPAL, a low-cost, single-element speaker that beams audio directly to a single listener like a ray of light.
Utilising acoustic and elastic metamaterials, the system modulates ultrasound waves to harness sound&rsquo;s nonlinear behavior in air, sharply focusing audio while blocking side leakage.&nbsp;
Once commercialised, it can deliver personalised audio experiences in public spaces without creating <a href="https://www.mid-day.com/mumbai/mumbai-news/article/mumbai-commuters-slam-noisy-ac-local-trains-railways-promise-inspection-23635164" target="_blank" rel="none noopener">noise pollution</a>.
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POSTECH researchers develop MiPAL, a low-cost speaker that beams personalised audio to one listener while reducing sound leakage and noise pollution

POSTECH develops speaker that beams personalised audio to one listener

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Once commercialised, it can deliver personalised audio experiences in public spaces without creating noise pollution

POSTECH researchers develop speaker that beams personalised audio to one listener

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