That implies because the force, the pressure is the same, our force must be much greater on the eardrum than on the outside of the ear. And so we have a mechanical advantage. So this concept in physics is known as a mechanical advantage. So not only does the pina actually amplify that wave, the eardrum also amplifies the wave by increasing the force that is felt on the membrane as a result of that mechanical wave. Now, this eardrum is connected directly to a bone known as the malleus. So inside the middle portion of the ear, we have the eardrum, and we have these three bones that collectively are known as the obstacles.