The Sound Dampening Metamaterial Cloak

Researchers at Duke University have developed a cloak made of perforated plastic sheets that successfully dampen sound. The cloak is designed to prevent sound from traveling forward by guiding the sound waves through holes in the plastic sheets, thereby stopping the waves cold and registering the cloak as nothing more than a wall. Steven Cummer, the researcher who came up with the project proposal, concluded that electromagnetic waves function just like acoustic waves, so since they'd already made metamaterial capable of bending microwaves they should be able to use it to bend sound waves in a similar manner. Read more about it at Science News.

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