How do bone conduction headphones work?
(Android Central)

Best answer: Bone conduction headphones work by vibrating against the bones in your cheek or upper jaw, which in turn sends those vibrations to the inner ear, bypassing the ear canal completely. Since they don`t depend on the eardrum, they can be great for people with hearing deficiencies, and since they aren`t in or over your ear, you`ll be able to hear what`s happening around you. They aren`t very good at reproducing sound that`s true-to-life because of their design, but sometimes sound quality isn`t the most important feature. Sound to the bone: AfterShokz Aeropex Wireless Bone Conduction Headphones ($160 from Amazon) Sound is vibration with bone conduction headphones Audio travels through the air in a pressure wave, and variations on the frequency and strength of that wave are what makes us hear different sounds. As the pressure wave hits our eardrums, they vibrate in time with the pressure wave and the cochlea — an organ inside your inner ear — interprets things to let ou...