Final answer:
The cochlea is the organ that converts sound into electrical impulses in the human head. It uses hair cells in the organ of Corti to transform vibrations into neural signals that are then sent to the brain.
Step-by-step explanation:
The organ where sound becomes electrical impulses in the human head is called the cochlea. The cochlea, part of the inner ear, is where sound waves are converted into neural signals. Sound waves travel through the ear canal, strike the eardrum, causing it to vibrate. These vibrations are then transmitted through the ossicles to the cochlea. Inside the cochlea, the vibrations cause fluid to move, which bends tiny hair cells.
This motion triggers the hair cells to send nerve impulses through the auditory nerve to the brain, where they are interpreted as sound. The organ of Corti, located within the cochlea, houses these hair cells and is directly responsible for the transduction of movements from sound waves into electrochemical signals.