Eustachian tube is a structure connecting the nasopharynx and middle ear cavity. Normally it is closed but it opens when we swallow or yawn. It serves to equalize the middle ear air pressure to the outside. Moreover during diving, elevating or landing of flight, there is also change of pressure. If the tube does not work, the pressure in the ear will be different to that outside. Thus affecting our hearing. It is known to be a predisposing factor to infection of the middle ear.
Ooo.. sebab tu lah bila telinga jadi 'pekak' kita telan air liur, jadi hilang pekak... sebab bila menelan, waktu tu tiub Eustachio terbuka. =) betullah, bila menguap pun telinga menjadi 'lebih mendengar'!Masalah bermula apabila.... berlaku jangkitan/inflamasi yang menyebabkan dinding tiub Eustachio membengkak, lantas menyempitkan @ menutup lubang tiub Eustachio. Maka, sebab itulah kita jadi kurang pendengaran...
p/s : dulu2 sy ingatkan dalam tiub Eustachio tu ada cecair...hehehehe..
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