Malleus, Incus, Stapes
Are three small bones positioned after the eardrum which amplifies incoming sound.
These three bones are collectively referred to as the [see page 4, ossicles].
It transmits the energy intersecting the large area ear drum through the small-area Oval window causing the sound to be amplified due to the [see page 5, increased pressure]. There're muscles around these bones which contract around large sounds to suppress extremely loud sounds.