If you enjoy music on the move, there's a very good chance that you've been troubled by earphones popping out of your ears just as you're getting into the groove. There are high-end earphones or professional in-ear monitors available that require the buyer to pop along to an audiologist and go through an uncomfortable custom fit process to ensure the buds won't keep falling out as you run through the park or jump around the stage. Or you could look into having a custom set of earphones made. This is precisely what Normal founder Nikki Kaufman did, but the significant cost and long shipping delay she encountered prompted her to find another way. She came up with a way to tailor each pair of earphones to the wearer using a free mobile app and a 3D printer.
Read the full article: 3D-printing gives Normal earphones a tailored fit