Exam 1 Q's

Question 1

What is the name of the membrane overlapping the haircells? Hint - it only makes contact with the stereocilia of the OHC

Answer 1

Tectorial membrane

Question 2

What letter of the alphabet is associated with the shape of the ear canal?

Answer 2

S

Question 3

The 4 primary regions of the temporal bone are

Answer 3

Petrous, squamous, mastoid, tympanic

Question 4

T/F The lateral portion of the external ear canal is 0.33 - 0.5 ml bony

Answer 4

False

Question 5

The ability to localize a sound source is based on 2 ears and the level and timing difference. Which one is higher frequency dominant?

Answer 5

Interaural level difference

Question 6

The organization of frequency along the basilar membrane and the central auditory system is called :

Answer 6

Tonotopicity

Question 7

The major excitatory neuro-transmitter of the IHC is :

Answer 7

Glutamate

Question 8

T/F Impedance refers to the ease of the flow of energy

Answer 8

False

Question 9

The mechanisms of the middle ear that adds the greatest amount of gain is the :

Answer 9

Area difference between the TM and the stapes

Question 10

The cochlea is filled with 2 types of fluid called :

Answer 10

endolymph and perilymph

Question 11

T/F Rostral refers to head and Caudal refers to tail

Answer 11

True

Question 12

T/F The IHC have the capacity to elongate and contract

Answer 12

False

Question 13

T/F The primary auditory complex is activated by word-like sounds only

Answer 13

False

Question 14

Which compartment of the cochlea houses the organ of corti

Answer 14

Scala media

Question 15

The muscle supplying the stapes is called the :

Answer 15

Stapedius muscle

Question 16

T/F The type of pressure we experience when diving down is positive pressure

Answer 16

False

Question 17

The region of the temporal bone located posterior to the auricle/pinna (i.e. the bump behind your ear) is the

Answer 17

Mastoid

Question 18

Sound A has an absolute power of 10-7 w/m2. Sound B has an absolute pressure of 2 x 103\muμPa. Which of the following statements is true (assume you can directly compare dBIL with dBSPL)

Answer 18

Sound A is more intense than Sound B

Question 19

T/F Regeneration of sensory receptors of the inner ear will happen in the next 10 years

Answer 19

False

Question 20

Sound A has a wavelength of 20m. Based on this information, which of the following statements is true :

Answer 20

The wavelength of Sound A is exactly the same as that of a sound with a frequency of 17Hz

Question 21

T/F The respective intensities of meeting incident and reflected waves determines whether there is constructive or destructive interference

Answer 21

False

Question 22

At which of the following phase values is there no displacement (ie. amplitude = 0)

Answer 22

180 degrees

Question 23

T/F The basal end of the Basilar membrane is more stiff

Answer 23

True

Question 24

which is the correct relationship between pressure and intensity?

Answer 24

intensity is proportional to pressure squared

Question 25

what is the frequency of sound A on your worksheet?

Answer 25

100 Hz

Question 26

What is the frequency of a sound with wavelength 1.372m (use speed of sound = 343 m/s)

Answer 26

250 Hz

Question 27

What is the period of sound B on your worksheet?

Answer 27

0.2 S

Question 28

What type of hearing loss is seen in Audiogram A on your worksheet?

Answer 28

Mixed

Question 29

what severity of hearing loss is seen in Audiogram A on your worksheet?

Answer 29

Moderate

Question 30

Distance a pure tone travels in 1 cycle

Answer 30

Wavelength

Question 31

phase of vibration that creates a decreased in density of air molecules which corresponds to a decrease in sound pressure

Answer 31

Rarefaction

Question 32

Refers to difference in threshold obtained by AC and BC

Answer 32

air-bone gap

Question 33

expressed in degrees relative to the angle around the cycle

Answer 33

phase

Question 34

testing method that stimulates the entire auditory system

Answer 34

air conduction

Question 35

Typical frequency range of human hearing

Answer 35

20-20,000 Hz

Question 36

Symbol representing left air conduction threshold

Answer 36

X

Question 37

What does 1 x 10-12 w/m2 represent?

Answer 37

Reference level for intensity

Question 38

T/F Insert earphones have the largest interaural attenuation value

Answer 38

True

Question 39

]] represents what pure tone audiometry threshold?

Answer 39

Left masked bone conduction

Question 40

T/F Intensity is coded by discharge rate and spread of excitation (number of fibers stimulated)

Answer 40

True

Question 41

What does log 1014 calculate out as?

Answer 41

14

Question 42

The first major anatomical structure of the central auditory pathway is the :

Answer 42

Cochlear nucleus

Question 43

T/F The Inferior Colliculus serves no major role in the processing of sound

Answer 43

False

Question 44

The Superior Olivary Complex is involved in localization. Which nuclei has been associated with the timing difference?

Answer 44

MSO

Question 45

What part of the auditory brain is involved in word comprehension?

Answer 45

Wernicke's Area

Question 46

T/F We hear with our brain not our ears

Answer 46

True