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Intro to Audiology > 1 - Anatomy & Physiology of Outer Ear > Flashcards

1 - Anatomy & Physiology of Outer Ear Flashcards

0
Q

Outer Ear

A

Auricle

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1
Q

Outer Ear Canal

A

External Auditory Canal

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2
Q

The visible part of the outer ear

A

Pinna

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3
Q

Eardrum

A

Tympanic Membrane

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4
Q

Sebaceous

A

Fatty

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5
Q

Are all auricles the same?

A

No. Each is different

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6
Q

What is the function of the outer ear?

A

Serves as a resonator

Aids in sound localization

Acts as a cushion for the temporal bone

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7
Q

What is the resonance of the cochlea?

A

About 5,000 Hz

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8
Q

What is the resonance of the External Auditory Canal?

A

Around 2500 Hz

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9
Q

What is resonance?

A

A peak of energy

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10
Q

What is the first 1/2 to 2/3 of the external ear canal composed of?

A

Skin over cartilage

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11
Q

What is the first 1/2 to 2/3 of the external ear canal lined with?

A

Glands that produce cerumen

Cilia (This prevents debris from getting in and helps debris migrate out)

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12
Q

What is the second 1/3 of the External Ear Canal composed of?

A

Skin over bone

This same skin is the first layer of the TM

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13
Q

How long is the external ear canal in adults?

A

29-30 mm

2.9-3.0 cm

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14
Q

How long is the external ear canal in infants?

A

14 mm

It grows to 21 mm by age 2

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15
Q

The temporal bone is ____________.

A

The hardest bone in the body

16
Q

What is the very tip of the outer ear canal called?

A

External Auditory Meatus

Intro to Audiology (11 decks)

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