How we hear the sounds

The cochlea is the part of the inner ear that is responsible for hearing. It is a long conical tube, coiled like a snail shell.

Inside the cochlea there is a complex structure called corti organ, responsible for capturing the stimuli produced by the sound waves.

The ear acts as a acoustic shell, which picks up sounds and directs them to the ear canal. Sound waves vibrate the air within the ear canal and the vibration is transmitted to the ear. eardrum.

Stretched like the skin of a drum, the tympanic membrane vibrates, moving the bone hammerwhich makes the anvil bonewhich in turn makes the stirrup bone. These ossicles function as vibration amplifiers. The base of the stirrup bone connects to a region of the membrane of the cochlea called an oval window, and causes it to vibrate, communicating the vibration to the cochlear fluid.

The movement of this liquid vibrates the basilar membrane and the sensory cells. The hairs of these cells, when lightly touching the tectonic membrane, generate nerve impulses, which are transmitted by the auditory nerve to the hearing center of the cerebral cortex.