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1. Auricle directs sound waves into the external auditory canal. The sound waves arrive at the tympanic membrane causing it to vibrate. Movement of the eardrum causes displacement of the auditory ossicles and the ossicles amlify the vibration of the tymbanic membrane. Movement of the stapes at the oval window establishes pressure waves in the perilymph of the vestibular duct.
2. intense episode of vertigo can be triggered by a specific change in the position of the head. You feel as if you're spinning when you bend down to look under something, tilt your head to look up or over your shoulder, or roll over in bed.Please let me know if you need any clarification. I'm always happy to answer your questions.
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