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. So we have the malleus, we have the incas, and we have the staples. Now, each one of these bones is smaller than the other one. It has a smaller lever arm.