Lesson 3 - The Middle Ear or Tympanic Cavity

Question 1

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

a. 12 dB
b. 15 dB
c. 27 dB
d. None of the above

Answer 1

c. 27 dB

Question 2

The footplate of the stapes fits into the:

a. incus
b. oval window
c. round window
d. incudostapedial junction

Answer 2

b. oval window

Question 3

A type “A” tympanogram would indicate:

a. possible ossicular discontinuity
b. chronic otitismedia
c. mandatory referral
d. normal pressure and compliance

Answer 3

d. normal pressure and compliance

Question 4

The difference in area size between the tympanic membrane and the footplate of the stapes increasing the sound pressure at the footplate is:

a. the transfer function or aerial ratio
b. hydraulic energy
c. impedance
d. static compliance

Answer 4

a. The transfer function or aerial ratio

Question 5

The middle ear cavity contains:

a. anvil, stapes and cartilage
b. stapedius, incus, Eustachian tube and isthmus
c. annular ligament, malleus, stapes and tensor tympani
d. incudostapedial junction, vagus nerve, stapedius and malleus

Answer 5

c. annular ligament, malleus, stapes and tensor tympani

Question 6

The middle ear system is often referred to as:

a. an impedence matching transformer
b. attenuation method
c. stapedial acoustic reflex
d. fundamental transformer

Answer 6

d. fundamental transformer

Question 7

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

a. mechanical energy to acoustic energy
b. acoustic energy to mechanical energy to hydraulic energy
c. acoustic energy to electrical energy hydraulic energy
d. mechanical energy to hydraulic energy to electrical energy

Answer 7

b. acoustic energy to mechanical energy to hydraulic energy

Question 8

The middle ear muscles contract, resulting in:

a. an acoustic reflex
b. ossicular discontinuity
c. increase in mechanical energy
d. none of the above

Answer 8

a. an acoustic reflex

Question 9

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

a. helicotrema
b. promontory
c. incotapedial joint
d. nasopharynx

Answer 9

d. nasopharynx

Question 10

The eustachian tube of a child is:

a. straight
b. short
c. horizontal
d. all of the above

Answer 10

d. all of the above