The chip is small enough to fit in the cavity of the middle ear
A team of researchers from MIT, the Massachusetts Eye and Ear Infirmary and the Harvard-MIT Division of Health Sciences and Technology has harvested the energy of a guinea pig’s inner ear to power a small sensing device. The electrical potential of the cochlea operates like a biological battery and is essential for turning sound pressure waves into the electrical signals sent to the brain. Researchers have developed a chip that can harness this electrical energy without interfering with normal hearing.
Eventually, the devices could monitor biological activity in the ears of people with hearing or balance impairments, or responses to therapies. Eventually, they might even deliver therapies themselves.