Looking for a unique tattoo? Elwood dropped me this note.
Not sure if you have ever heard of this, but I stumbled across this when a friend was talking about getting a Chris Cornell memorial tattoo. It is a sound wave tattoo by a company called Skin Motion.
Basically, a waveform gets registered to a user, then the wave is tattooed. You play back the wave on an app and you get the audio associated with the tattoo.
Having worked in the tattoo world, it looks like they are basically keeping a database of sound files, then matching an image to the wave, so when you register after the tattoo, it locks into your sound file.