You can find deaf people in Mordor. It is in the southeast of northwestern Middle-earth to the East of Anduin, the great river. Orodruin, a volcano in Mordor, was the destination of Thomas Gallaudet (and later Laurent Clerc and I King Jordan) in the quest to destroy audism. Mordor was unique because of the three enormous mountain ranges surrounding it, from the north, from the west and from the south. The mountains both protected the land from an unexpected invasion by any of the people living in those directions and kept those living in Mordor from escaping from ASL.