Auditory

Question 1

What are the ossicles?

Answer 1

the incus, malleus and stapes

Question 2

How do the ossicles transduce sound?

Answer 2

the malleus is attached to the tympanic membrane which stimulates the incus to push the stapes into the oval window upon vibration

Question 3

What is the cochlea?

Answer 3

a fluid filled chamber which without the ossicles would create sounds of 1dB from 30dB

Question 4

What are methods of impedance matching?

Answer 4

the area of the tympanic membrane is 20:1 on the stapes +26dB
the lever action increases 2dB
buckling of ear drum increases the pressure x2 +6dB

Question 5

What is the basic anatomy of the cochlea?

Answer 5

3 fluid cavites - scala vestibuli, scala media and scala tympani - scala media and vestibuli separated by resiners membrane and scala media and tympani are separated basilar membrane

Question 6

Where does signal transduction occur in the auditory?

Answer 6

the organ of corti hair cells