Exam 3

Question 1

We test SRS ___ db above SRT

Answer 1

30

Question 2

What does SRS stand for?

Answer 2

Speech recognition score

Question 3

What is an example of an SRS?

Answer 3

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

Question 4

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

Answer 4

2000

Question 5

How many turns does the cochlea make?

Answer 5

2.5

Question 6

Where is the organ of Corti found?

Answer 6

Scala media

Question 7

Responsible for the transduction of energy

Answer 7

Organ of Corti

Question 8

Refers to the movement of the scala media

Answer 8

Traveling wave

Question 9

Where are high frequencies displaced in the cochlea?

Answer 9

Base

Question 10

Where are low frequencies displaced in the cochlea?

Answer 10

Apex

Question 11

When do the stereocilia get bent?

Answer 11

Organ of Corti and tectorial membrane rub against each other

Question 12

Where are the longer stereocilia embedded in ?

Answer 12

Tectorial membrane

Question 13

What is an example of passive action in the cochlea?

Answer 13

Earplugs

Question 14

Source of power to cancel noise

Answer 14

Active action

Question 15

What is an example of active action?

Answer 15

Noise canceling earplugs

Question 16

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

Answer 16

Traveling wave theory

Question 17

What is the base of the basilar membrane like?

Answer 17

Narrow, thin, stiff

Question 18

What is the apex of the basilar membrane like?

Answer 18

Wide, thick, loose

Question 19

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

Answer 19

Increases

Question 20

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

Answer 20

Decreases

Question 21

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

Answer 21

Outer hair cells

Question 22

Hair cells that transfer sounds to the brain

Answer 22

Inner hair cells

Question 23

Hair cells that elongate and get shorter when sound source enters

Answer 23

Outer hair cells

Question 24

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

Answer 24

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

Question 25

What 2 phases cause the fine tuning of sound?

Answer 25

Inhibitory and excitatory

Question 26

Why were Bekesy’s traveling waves partially wrong?

Answer 26

Measurements were at high levels (no active mechanism was tested)

Question 27

What is the actual traveling wave?

Answer 27

Cochlear amplifier at low stimulus levels near threshold

Question 28

What types of sounds only use the passive system?

Answer 28

Loud

Question 29

What types of sounds only have fine tuning?

Answer 29

Softer

Question 30

Any sound that is produced by the cochlea and can be recorded in the ear canal

Answer 30

Otoacoustic emissions