The cochlea is a fluid-filled, spiral-shaped cavity found in the inner ear that plays a vital role in the sense of hearing and participates in the process of auditory transduction. The function of the cochlea is to transform complex airborne vibrations into auditory neural impulses that the brain can interpret as individual sound frequencies. The cochlea is responsible for the tonotopic map that enables humans to perceive various frequencies of sound. Specific areas along the cochlea are stimulated by vibrations carried within a fluid known as endolymph in the cochlear duct. The vibrations are then converted to electrical impulses in the cochlear duct through mechanical stimulation of hair cells within a unique structure known as the organ of Corti. The vestibulocochlear nerve (CN VIII) then carries these impulses from the cochlea to the brains auditory cortex for interpretation. In summary, the function of the cochlea is to transform sound waves into electrical impulses that the brain can interpret as individual sound frequencies.