Sound signal directly to the cochlea receptors from the oval window through the fluid to the receptors.
Scheme of physiology of activity: a sound wave entering the external auditory meatus vibrates the eardrum → it transfers this vibration to the middle ear to the system of auditory ossicles, which, acting as a lever, amplify sound vibrations and begin to oscillate the oval window membrane → the oval window membrane vibrates the fluid located between the bony and membranous labyrinths of the inner ear, → this fluid transfers its vibrations to the basement membrane → the basement membrane shifts and transfers vibrations to the mechanoreceptor cells whose hairs also begin to oscillate → oscillate, the hairs of the mechanoreceptor cells touch the integument membrane, and an electrical impulse arises in them ( nervous), which is transmitted through a system of switching nuclei located in the middle and diencephalon, to the cortex (temporal lobe of the cerebral hemispheres), where the frequency and strength of sound signals are correlated, complex sounds are recognized. The meaning of what is heard is interpreted in associative cortical zones.
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