Big Think: The "Invisibility Cloak"

Oh, Big Think...you've let me down.
http://bigthink.com/big-think-tv/are-we-closer-to-building-an-invisibility-cloak
The article asks, "Are we getting closer to building an invisibility cloak?" It then goes on to suggest that it does, when all the evidence it gives screams, "HELL NO!" Apparently, Duke University has created some sort of an "acoustic cloak," but what on this earth does this mean? The video the article provides us with gives absolutely no clear idea as to what this is. And since the article mentions research done by Duke University, you'd think that they'd give you a bit of that research, right? Well, apparently Big Think has been having an off-day, because the only source here is the Huffington Post, the articles of which are about as reliable as those of The Onion. What's even better, the author only gives four concise sentences from this article, which is linked to. Click the link, and you get the full article, which claims that sound waves make the object invisible to the naked eye. Click another link, and you get to a site called LiveScience with the same video present in the article, which is less than useless, but this one is useful - because the description states that this "acoustic cloak" is meant to shield an object from SONAR. So yes, it's an invisibility cloak, the same way an F-22 Raptor is an invisible plane. In other words, it isn't invisible, and there's no evidence to suggest that this could ever be used to create an "invisibility cloak."