Inside Samsung’s design process to make your earbuds fit just right

Federico Casalegno has been thinking about ears. Billions of ears. “Ears are almost like fingerprints. Every one of us has a different one,” says Casalegno, executive vice president of design at Samsung. It’s a pertinent topic for Samsung, maker of a variety of earbuds, and for Casalegno, who’s in charge of figuring out how to make those earbuds—along with a deep portfolio of wearable technology products like smartwatches and smart rings—as comfortable and useful as possible. [Photo: Samsung] Wrapping one’s head around billions of ears—or wrists or fingers or, indeed, entire heads—is a tric...