This is a news story, published by New Atlas, that relates primarily to Penn State news.
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human earNew Atlas
•Technology
Technology
78% Informative
Penn State researchers have developed a system that can project sound to only be heard by one person standing or sitting in a specific location.
Sound is emitted in the form of ultrasound waves by two transducers, which emit waves at slightly different frequencies.
Each of the waves is inaudible to the human ear if encountered on its own.
If someone is located right at the point where the waves intersect, their combined signals produce audible sound.
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informal
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English
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long-living
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