The cochlear implant was the first effective and is still the most common neuroprosthetic device which is employed for people with severe to profound hearing loss. To restore auditory perception. an array of micro-electrodes that deliver electrical pulses to the auditory nerve is surgically implanted into the lower cochlea duct. the scala tympani (ST). https://macorners.shop/product-category/led-light-acrylic-plaque-with-couple-necklace/