Which type of implant provides direct electric stimulation to the auditory nerve fibers?

The cochlear implant is designed to provide direct electrical stimulation to the auditory nerve fibers. This device bypasses damaged hair cells in the cochlea, converting sound waves into electrical signals that can directly stimulate the auditory nerve. This stimulation allows individuals with profound hearing loss to perceive sound.

In contrast, bone-anchored hearing aids work by transmitting sound vibrations through the bone to the inner ear but do not directly stimulate the auditory nerve. An auditory brainstem implant also provides direct stimulation but is specifically used for patients who do not have functioning cochleae. Hearing aids amplify sound in the ear canal, enhancing the natural hearing process without introducing electrical stimulation directly to the auditory nerve.