Technology in these days changes everything, even faster that we can imagine. For example a new amazing technology has the potential to turn just about any surface, including your walls, into a speaker. Johns Hopkins materials scientist Michaely Yu and his team have made a rubbery plastic-based material that could help place piezoelectric devices in previously impractical areas, including your walls. Personally I can’t even imagine how this technology can work, but for those of you who want to know more about this new technology you can take a look at the patent application of this new technology. - Via 1, 2