Now, notice that the area of the eardrum is much smaller than the area of the pinna, this outside covering of our ear. Now, we know from physics that the pressure outside the ear is exactly the same, that the pressure is inside this region. But what is different is our area, because the area inside our eardrum, the area of the eardrum, is so much smaller than the area of the pin. 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.