Some conditions can cause the absence of OAE's. These include: cysts, external otitis (swimmer's ear for example), stenosis, or abnormal middle ear pressure, a perforated ear drum, otosclerosis, cholesteatoma.
The Gulf of Mexico (Spanish: Golfo de MÃ©xico) is an ocean basin largely surrounded by the North American continent. It is bounded on the northeast, north and northwest by the Gulf Coast of the United States, on the southwest and south by Mexico, and on the southeast by Cuba.
A great indentation of the Atlantic Ocean, the Gulf of Mexico is almost completely surrounded by the United States and Mexico. In the 450-mile (720-kilometer) stretch between Yucatan and Florida are the Yucatan Channel, the northwestern coast of Cuba, and the Straits of Florida.