Medications That Cause Tinnitus - 4 Things You Need to Know

During takeoffs and landing of Sharpear airplanes a usual rate of change of pressure occurs in the ear of a person. To control this change of pressure a pressure regulating ear plug is very helpful to reduce its effects on Eustachian tube (a tube that links pharynx to the middle ear) and prevent an unexpected hearing loss.Different types of ear plugs are designed to save the user from these damages. Some of these are made of silicone which forms an air tight seal in the ear canal. Some are not able to seal the air canal. These are made of a combination of open- and closed-cell foam. The plug delays the air pressure build up between middle ear and external ear canal. It creates an enclosed environment between ear drum and external environment. Slowly and gradually, the ear plug leaks out air either into or out of the volume that is attached with immediate exterior of the ear drum. This delay equates the pressure in the outside environment with the pressure of the middle ear.Mostly the ear plug is used in the situation during takeoff and landing of aircraft because in this way, at the ground level, pressure of the middle ear and the atmospheric pressure can equalized with the help of Eustachian tube. In this way the ear plug helps in reducing the rate of change of pressure in external ear canal, thus reduces the discomfort occurred due to restricted flow of air through the Eustachian tubes. It also increases the time required to equalize the pressure in the environment with the pressure in the ear canal.The above mentioned ear plugs have an extremely low leak rate, so it is not possible to measure it accurately with any conventional equipment. A simulator constructed in the laboratory is used to get an ear plug with the accurate measure of leak rate. It is therefore very necessary to use these ear plugs to prevent pain, discomfort and hearing loss.

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