<http://schema.org/description>
"Scientists at the University of California Berkeley claim to have produced a \"bottle\" beam of acoustic energy that can precisely direct sound waves through open air without the need for waveguides or other mechanical assistance, promising applications in acoustic cloaking and levitation."^^<http://www.w3.org/2001/XMLSchema#string>
<http://newatlas.com/acoustic-bottle-beams-imaging-cloaking-levitation/33231/>