Lesson 3

Question 1

Theoretically, the increase in sound pressure provided by the middle ear structure is about

Answer 1

27 dB

Question 2

The footplate of the stapes fits into the

Answer 2

oval window

Question 3

A type “A” tympanogram would indicate

Answer 3

normal pressure and compliance

Question 4

The Difference in area size between the tympanic membrane and the footplate of the steps increasing the sound pressure at the footplate is

Answer 4

the transfer function or aerial ratio

Question 5

The middle ear cavity contains

Answer 5

annular ligament, malleus, stapes and tensor tympani

Question 6

The middle ear system is often referred to as

Answer 6

an impedance matching transformer

Question 7

The middle ear cavity, as a transducer, changes energy from one form to another. Then energy change is from

Answer 7

acoustic energy to mechanical energy to hydraulic energy

Question 8

The middle ear muscles contract, resulting in

Answer 8

an acoustic reflex

Question 9

The Eustachian tube begins in the lower portion of the tympanic cavity and ends at the

Answer 9

nasopharynx

Question 10

The Eustachian tube of a child is

Answer 10

Straight, short, horizontal