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Flashcards in Outer Ear Deck (10)
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1
Q

What are the two main functional purposes of the pinna?

A
  • Protection

- Sound collection/localization

2
Q

What are the major audiological consequences of pinna damage?

A
  • Minor audiological consequences

- Loss of resonances

3
Q

In children the ear canal is roughly what direction? In adults?

A
  • Children: horizontal/perpendicular to the pinna

- Adults: horizontal but slightly downward sloping

4
Q

What is the general shape of the ear canal? Why is it shaped like this?

A
  • Lazy S shape

- Protection of the TM

5
Q

What portion of the ear canal is surrounded by cartilage? Bone?

A
  • Cartilage: lateral 1/3

- Bone: medial 2/3

6
Q

Cerumen is produced in what part of the ear canal?

A

-Cartilage (lateral 1/3)

7
Q

What is the function of cerumen?

A

-Antibacterial
-Antifungal
-Anti-insectal
^^to protect the TM

8
Q

The ear canal primarily acts like what kind of resonator?

A

-Open/closed pipe

9
Q

At what frequency is the primary resonance of the ear canal and meatus?

A

-3-4 kHz

10
Q

What parts of the body contribute to the resonances by the time one reaches the tympanic membrane?

A
  • Torso
  • Head
  • Pinna