The role of the cochlea includes receiving sound signals to generate nerve impulses and conducting nerve impulses. 1. Accepting sound signals to generate nerve impulses: the external sound is first collected through the human auricle, the collected sound is conducted to the tympanic membrane through the external auditory canal, and then through the auditory ossicular chain to form mechanical vibration, the vibration is transmitted to the internal and external lymphatic fluid in the cochlea, which turns into liquid vibration, and the liquid vibration stimulates the cochlea’s hair cells to generate nerve impulses. 2. Conducting nerve impulses: The hair cells of the cochlea form synaptic connections with the nerve fibers of the auditory nerve. When the hair cells of the cochlea are stimulated by sound waves to generate nerve impulses, the nerve impulses can be transmitted to the auditory nerve through the synaptic relationship with the auditory nerve, and the auditory nerve further transmits the nerve impulses to the auditory center of the brain, thus generating the sense of hearing. When hearing abnormalities occur, please consult the hospital in time to clarify the causative factors and lesion sites, and follow the doctor’s instructions to take standardized diagnosis and treatment.