In what structure of the ear is formed a nerve impulse to external sound stimulation.

This takes place in the inner ear. There are three parts of the auditory organ in total. This is the outer, middle, and inner ear. All parts are concentrated in the inner ear, which perform the function of perceiving sound vibrations, converting them into a certain nerve impulse and transmitting the impulse to the brain for further decoding and analysis. The creation of a nerve impulse occurs in the cochlea. This part of the inner ear gets its name because of its structure, which resembles a snail. The pulse is formed and transmitted very quickly in a fraction of a second.