the inner ear - cochlea and organ of Corti

the organ of Corti

Every incoming frequency of a sound wave causes the fluid and a particular section of the hair cells to vibrate. Once the hair cells start to vibrate, ion flows cause a “transformation” similar to electricity in the cells, which causes the cells to produce the carrier substance glutamate. This carrier substance then triggers an electrical impulse (14) in the cells of the auditory nerve, which is transmitted to the brain.