<em><span id="innercontent"><span class="newsitembody"><span>'We've devised a recipe for an acoustic material that would essentially open up a hole in space and make something inside that hole disappear from sound waves.'</span></span></span></em>

<em><span id="innercontent"><span class="newsitembody"><span>In 2006, researchers at Duke and the Imperial College London used a new design theory to create a blueprint for an electromagnetic invisibility cloak. Only a few months later, the team demonstrated the first such cloak, designed to operate at microwave frequencies.</span></span></span><span></span></em>

<em><span></span><span id="innercontent"><span class="newsitembody"><span>'In my mind, waves are waves. It was hard for me to imagine that something you could do with electromagnetic waves would be completely undoable for sound waves.'</span>

</span></span></em>

<span id="innercontent"><span class="newsitembody"><span>Steven Cummer, Jeffrey N. Vinik Associate Professor of Electrical and Computer Engineering at Duke's Pratt School of Engineerin.</span></span></span>

Full story at <a href="http://news.duke.edu/2008/01/3dsoundcloak1.html" target="_blank">Duke News</a>