The tympanum or eardrum is a membrane located in the

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The tympanum (or eardrum) is a membrane located in the middle ear just after the auditory canal, which separates the middle ear from the outer ear. The function of the tympanum is to vibrate with the same frequency of the sound waves that reach it. 6. How are vibrations captured by the tympanum transmitted through the ossicular chain of the middle ear? The acoustic transmission from the outer to the middle ear (and to the internal ear too) is entirely mechanical. The vibration of the tympanic membrane triggers the vibration of the hammer, which then causes the incus to vibrate. The incus then causes the stapes to vibrate. 7. Why do you feel a change in pressure inside your ear when you go down a mountain? The pressure inside the middle ear is maintained equal to the outer ear (as well as to the exterior environment) due to a communicating duct between the middle ear and the pharynx called the auditory tube, or Eustachian tube. When someone
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goes down a mountain, the air pressure upon on the middle ear increases and it is necessary to do exercises such as fake swallowing to force the opening of the pharyngeal orifice of the auditory tube to equalize the pressure once again. The Internal Ear 8. What elements make up the inner ear? What are the functions of those structures?
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