The tip of the probe has a pressure transducer that changes the pressure in the external ear canal from negative, through atmospheric pressure, to positive pressure. While the pressure is changing, a sound transmitter sends a sound wave to the tympanic membrane.hysics of the Tympanogram. If the middle ear space is filled with fluid, most of the sound is reflected back to the probe from the stiff tympanic membrane. If the middle ear space is filled with air, and the ossicles are intact, energy is absorbed by the tympanic membrane, ossicles, and inner ear structures.
FOODS THAT FIGHT CANCERâ¢. December. No single food or food component can protect you against cancer by itself. But strong evidence does show that a diet filled with a variety of plant foods such as vegetables, fruits, whole grains and beans helps lower risk for many cancers.
Foods that fight colon cancer. Experts estimate that making even moderate diet and lifestyle changes can prevent about 70 percent of colon cancers. Beans, lentils, peas and other foods high in folate. If colon cancer runs in your family, pile your plate high with these foods. Along with fibre, they also contain vast stores of folate, a B vitamin that protects cell DNA from damage.