Bone conduction hearing devices are used to treat certain types of hearing loss. They use vibrations through the bones of the skull to amplify sound. These vibrations directly stimulate the cochlea, so they're used for hearing loss caused by issues with the outer and middle ear, rather than the inner ear or cochlea.
There are both surgical and nonsurgical bone conduction hearing devices. Nonsurgical options are worn on a headband or attached to the skin with an adhesive. Surgical options have an internal component and an external part. Your doctor will help you decide on the best option based on your type of hearing loss, health history, and lifestyle factors.