CNET sound engineer Bryan VanGelder got a tattoo specially to try it out. Bryan VanGelder was a technical producer for CNET. He's a metal-head, an A/V geek and a radio nut, and he spends too much ...

He calls them "soundwave tattoos" and they work by combining with an app on your smartphone. The app generates a sound wave pattern based on one minuted of audio - which can be spoken word ...