What You Must Know About Ear Anatomy
The ear drum is a thin membrane that separates the middle ear cavity from the outer ear canal. Sounds waves vibrate the ear drum, which connects via a sophisticated lever and piston amplifier system that transmits sound waves to the inner ear. Normally, the middle ear cavity should have the same pressure as the outer ear canal. This is made possible by the function of the eustachian tube, which connects your middle ear cavity to the back of your nose. Whenever you swallow or yawn, your palatal and throat muscles open up the eustachian tube temporarily, equalizing pressure between the middle ear and the nose. You can think of the middle ear as a sinus-an out-pouching from the nose into an adjacent pocket of bone or soft tissue.