What the heck is a bone conduction headphone? It is a headphone that doesn’t push sound through your earhole, but instead conducts sound through the bones of your skull. So the idea is that these are easier on your eardrums, don’t block your regular hearing (safer), and are very comfortable. The Aftershokz Bluez 2 Bone Conduction Headphones ($79.95) are great for listening to music and also come with a built-in noise canceling microphone for phone calls. Video after the break.