Exam 3 Flashcards

1
Q

We test SRS ___ db above SRT

A

30

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2
Q

What does SRS stand for?

A

Speech recognition score

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3
Q

What is an example of an SRS?

A

“say the word __” and the person repeats the word

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4
Q

As long as _____ Hz is normal, even hear loss drops significantly afterwards people will still have good speech understanding

A

2000

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5
Q

How many turns does the cochlea make?

A

2.5

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6
Q

Where is the organ of Corti found?

A

Scala media

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7
Q

Responsible for the transduction of energy

A

Organ of Corti

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8
Q

Refers to the movement of the scala media

A

Traveling wave

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9
Q

Where are high frequencies displaced in the cochlea?

A

Base

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10
Q

Where are low frequencies displaced in the cochlea?

A

Apex

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11
Q

When do the stereocilia get bent?

A

Organ of Corti and tectorial membrane rub against each other

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12
Q

Where are the longer stereocilia embedded in ?

A

Tectorial membrane

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13
Q

What is an example of passive action in the cochlea?

A

Earplugs

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14
Q

Source of power to cancel noise

A

Active action

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15
Q

What is an example of active action?

A

Noise canceling earplugs

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16
Q

Fluid wave is formed as sound is passing through the basilar membrane

A

Traveling wave theory

17
Q

What is the base of the basilar membrane like?

A

Narrow, thin, stiff

18
Q

What is the apex of the basilar membrane like?

A

Wide, thick, loose

19
Q

What does the base of the basilar membrane do to resonant frequency?

20
Q

What does the apex of the basilar membrane do to resonant frequency?

21
Q

What type of hair cells are responsible for cochlear amplification and fine tuning of sound?

A

Outer hair cells

22
Q

Hair cells that transfer sounds to the brain

A

Inner hair cells

23
Q

Hair cells that elongate and get shorter when sound source enters

A

Outer hair cells

24
Q

What is included in the active system of the cochlea (2)?

A

Outer hairs elongating and shortening, stereocilia creates a more robust movement

25
What 2 phases cause the fine tuning of sound?
Inhibitory and excitatory
26
Why were Bekesy's traveling waves partially wrong?
Measurements were at high levels (no active mechanism was tested)
27
What is the actual traveling wave?
Cochlear amplifier at low stimulus levels near threshold
28
What types of sounds only use the passive system?
Loud
29
What types of sounds only have fine tuning?
Softer
30
Any sound that is produced by the cochlea and can be recorded in the ear canal
Otoacoustic emissions