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Intro to Audiology > Week8 > Flashcards

Week8 Flashcards

1
Q

Impedance Definiton

A

opposition to flow of energy

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2
Q

Compliance Definition

A

the inverse of impedance

amount of sound transmitted through the middle ear in mL

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3
Q

Components of a tympanometer

A

Probe tip=placed into ear canal to form an air-tight seal.

Air pump=changes pressure inside the ear canal.

Loudspeaker=presents tone of 226 Hz into ear canal.

Microphone measures how much of the 226-Hz probe tone is transmitted through the middle ear

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4
Q

Peak Pressure

A

pressure value at maximum compliance in daPa

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5
Q

. Ear canal volume

A

estimate of volume between the probe and the tympanic membrane (units of cc)

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6
Q

Type A Tympanogram

A

normal peak pressure and compliance and ear canal volume

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7
Q

Type Ad Tympanogram (hypercompliant)

A

abnormally high compliance, normal peak pressure and normal ear canal volume (ossicular discontinuity and monomeric tympanic membrane).

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8
Q

Type As Tympanogram (Shallow)

A

compliance is abnormally low, peak pressure normal, ear canal volume normal

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9
Q

Type B Tympanogram (Flat)

A

no measurable peak or compliance

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10
Q

Type C tympanogram

A

compliance is highest when pressure in ear canal is negative (Eustachian tube dysfunction)

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11
Q

Ear Canal normal volume

A

0.9-2.0 cc

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12
Q

Type B normal volume

A

otitis media

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13
Q

Type B large volume

A

Perforation of Tympanic membrane or PE tube

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14
Q

Type B Small volume

A

cerumen impaction

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15
Q

Present Acoustic Reflex

A

Normal hearing, mild and moderate sensorineural hearing loss, lesions of the auditory cortex

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16
Q

Absent Acoustic Reflex

A

conductive hearing loss (ipsilateral reflex), Severe and profound sensorineural hearing loss, lesions of auditory nerve and brainstem, facial nerve disorders

17
Q

Definition of acoustic reflex threshold

A

Lowest elicitor intensity that causes decrease in compliance of >/= 0.02 mL

18
Q

Normal acoustic reflex range

A

70-100 dB HL

Intro to Audiology (6 decks)

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