It eventually is captured by the pin of the ear and directed into the ear canal. And we have this amplification process taking place. The pin of the ear amplifies the wave by about times two. Now, when our mechanical wave travels through this region, through the ear canal, inside the ear canal, we have many air molecules. And as these air molecules vibrate back and forth, they eventually cause their eardrum, also known as our tympanic membrane, which is basically a membrane of a sort, the vibrations of the air molecules inside the ear that causes our membrane, the eardrum, to vibrate as well. So at the end of the ear canal, the mechanical wave hits and vibrates the eardrum, our tympanic membrane.