How do vibrations get from the middle ear to the inner ear?

Vibrations from sound waves enter the middle ear and cause the eardrum to vibrate. These vibrations are transmitted through three tiny bones called the ossicles (malleus, incus, and stapes), which amplify the sound. The stapes, the last of the ossicles, connects to the oval window of the cochlea in the inner ear, where the vibrations create fluid waves. These fluid movements stimulate hair cells in the cochlea, converting the mechanical vibrations into electrical signals that are sent to the brain.