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Audiometry > Week 3 - Physiology of the ear > Flashcards

Week 3 - Physiology of the ear Flashcards

1
Q

Where is the Auricle located?

A

At the outer part of the ear

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2
Q

Describe Auricle

A
  • It is the visible part of the ear

* Another name for it “Pinna.”

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3
Q

State the function of Auricle

A
  • Sound collection
  • Amplifies sound
  • Localisation of sound
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4
Q

What is around the outer ear

A

The Auditory Canal

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5
Q

How long does the auditory canal stretch

A

From the auricle to the eardrum

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6
Q

What do 1/3 of the outer ear made and consist of

A

Made from cartilage, with hairs, wax, and sweat glands

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7
Q

What do the 2/3 of the inner ear made and consist of

A

Bony, no hair, wax, or wax glands

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8
Q

What is the purpose of the auditory canal?

A
  • Protect the eardrum

* Amplifiy sound

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9
Q

Is it true that the eardrum together with the auditory canal acts like tube open only at one end?

A

Ture

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10
Q

Due to localization and amplification, how much are the sound boosted at 3.3KHz

A

15dB

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11
Q

Is it true that the amplification provided by the outer ear is bother frequency dependent as well as direction-dependent?

A

Ture

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12
Q

What does the middle ear consists of?

A
  • Tympanic Membrane
  • The ossicles
  • The middle ear cavity
  • Two muscle (Stapediu, tensor tympani)
  • The facial nerve
  • The eustachain tube
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13
Q

Describe the Tympanic membrane

A

•10mm translucent oval and cone shaped
•Vibrate with incoming sound waves, what this means it that it changes air vibration of sounds to mechanical movement of the drum
[Ear drum]

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14
Q

What it the ossicle made of?

A

•3 Tiny bones

  • Malleus
  • Incus
  • Stapes
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15
Q

What is the function of the ossicles

A

It amplify the incoming sound waves by increasing the pressure at the entrance of cochlea
•Though the amplification is frequency dependent

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16
Q

What is the function of the eustachian tube in terms of how it is connected

A

•It connects the middle ear with the nasopharynx

17
Q

What is the function of the eustachian tube in terms of secretions

A

•Allow secrestions to drain

18
Q

What is the function of the eustachian tube in terms of when is it functioning

A

•It is functionally closed at rest and opens with swallowing

19
Q

What is the funtion of the eustachian tube in relates to atmospheric pressure

A

•Keeps the middle ear pressure equal to atmospheric pressure

Audiometry (3 decks)

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