Function of the round window

The round window is a flexible membrane located in the cochlea of the inner ear. Its primary function is to accommodate the pressure changes created by the movement of fluid within the cochlea during sound transmission. When the stapes bone vibrates against the oval window, the round window bulges outward, allowing for the proper displacement of fluid, which is essential for the conversion of sound waves into nerve impulses for hearing. This mechanism helps prevent excessive pressure buildup in the cochlea, ensuring optimal auditory function.