| Ear Canal |
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The ear canal or '''external auditory meatus''' is a tube running from the Outer Ear to the Middle Ear . The ear canal extends from the Pinna to the Eardrum and is about 26 Mm in length and 7 mm in diameter. Size and shape vary among individuals. This is an important factor to consider when fitting Hearing Protectors . The ear canal protects the Eardrum and acts as a Resonator , providing about 10 DB of gain to the eardrum at around 3,300 Hz . The net effect of the Head , Pinna , and ear canal is that sounds in the 2,000 to 4,000 Hz region are amplified by 10 to 15 dB. Sensitivity to sounds is greatest in this Frequency region and noises in this range are the most hazardous to hearing. The outer foundation of the ear canal is Cartilage covered with Skin that contains hairs and glands that secrete wax. The hairs and wax ( Cerumen ) help prevent foreign bodies, such as Insects or dust, from entering the ear canal. DISORDERS The ear canal, because of its relative exposure to the outside world, is a common victim of diseases and other disorders. Some disorders include:
REMOVING AN INSECT IN THE EAR CANAL<BR> 1. DO NOT let the person put their fingers in the ear, since this may cause the insect to sting. 2. Turn the person's head so that the affected ear is facing upwards, and wait to see if the insect flies or crawls out. 3. If this doesn't work, try pouring mineral or baby oil into the ear. As you pour the oil, wobble the earlobe gently backward and upward for an adult, or backward and downward for a child. The insect should suffocate and may float out in the oil. REFERENCES |
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