Bone conduction is the latest technological development in the headphone space. It is essentially converting audio data to vibrations that travel across the bones in your skull to reach your inner ear along the auditory nerve. This means you do not need to put anything inside your ears, which comes with its own pros and cons. While you dont get the isolation and immersion that headphones or earphones offer, you are more aware of the world around you, which is especially beneficial when out in public.