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Acoustic tag embedded inside octopus shapes
An acoustic tag is embedded inside these octopus shapes that can be detected by analyzing filtered sound using an iPhone app. Researchers developed a method to control sound waves using a computational approach, inversely designing acoustic filters that can fit within an 3D shapes while achieving target sound filtering properties.
[Research supported in part by U.S. National Science Foundation grant IIS 1453101.]
To learn more, see the NSF News From the Field story Columbia Engineering researchers use acoustic voxels to embed sound with data. (Date image taken: 2015; date originally posted to NSF Multimedia Gallery: Oct. 4, 2016)
Credit: Changxi Zheng, Columbia University
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