Bone-conduction hearing aids, compared with the traditional air-conduction hearing method, eliminate the need for sound transmission in the external auditory canal and tympanic membrane The steps are more focused on transmission through the bones, providing the brain with critical and high-quality acoustic information to achieve listening Sound can also be transmitted to the auditory nerve through ·the skull and jaw bone rather than the eardrum, causing hearing. The specific conduction pathway is: "sound waves-skull-bone labyrinth-inner ear lymph-spiral-auditory nerve-cerebral cortex." layer auditory center".