If you’re not a fan of sticking things in or over your ears, your only option for listening to music are speakers that might well bother everyone around you. Right? Nope! There’s a new category of personal music listening device that’s just showing up and it’s ingenious: Sunglasses with built-in directional speakers. Nothing on or in your ears, and a design that lets you retain privacy in all but the quietest environments. Let’s look closer…