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  • Newly developed cloak hides underwater objects from sonar

    Illinois professor Nick Fang developed a two-dimensional acoustic cloak that makes objects in the center invisible to sonar and other ultrasound waves.

    Illinois professor Nick Fang developed a two-dimensional acoustic cloak that makes objects in the center invisible to sonar and other ultrasound waves.

    Photo by L. Brian Stauffer

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  • Editor's note: To contact Nicholas Fang, call 217-265-8262; e-mail nicfang@illinois.edu. The paper, “Broadband Acoustic Cloak for Ultrasound Waves,” is available online.