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12/25/2011

Sound cloak to trap sound waves

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    The idea is to develop an invisibility cloak that will trap sound waves, preventing the sound from leaving the material.
    The proof of concept 'cloak' will be a small, thin plate made up of rings of micro-structured polymer material that will resonate at different frequencies. Sound wave vibrations will follow a circular path around the plate, unable to leave the material.
    The cloak will differ from conventional noise protection devices in that the sound waves will be neither absorbed nor reflected.
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