Behold, the "I Do" rings by Japanese artist and designer Sakurako Shimizu. Each set of bands is custom made, etched with a waveform of a couple's voices uttering any words they choose. (So long as it's pithy enough to fit on the band, we're assuming. "I do" seems a fitting choice, considering.)
Rings are available through Shimizu's website in silver, 18K and 14K white/yellow/red gold, or platinum. Some of the geekiest matrimonial bling we've seen since that dude who hand-forged his wedding ring out of a meteorite.