Hearing Physiology & Disabilities

Question 1

Sound propagates at 400 m/s. (T or F)

Answer 1

False (335 m/s)

Question 2

100 dB causes damage to ear. (T or F)

Answer 2

True

Question 3

Human speech range

Answer 3

300 to 3500 Hz

Question 4

Human hearing range

Answer 4

20 to 20,000 Hz

Question 5

age-induced deafness (presbycusis) causes (4)

Answer 5

1. degeneration of organ of corti
2. atrophy of cochlea
3. loss of hair cells
4. stiffening of basilar membrane

Question 6

noise-related deafness cause

Answer 6

long-term exposure to noises damaging sensory hair cells

Question 7

Conduction deafness is caused by…

Answer 7

lack of sound transmission.

Question 8

Nerve deafness is caused by…

Answer 8

lack of transmission of electrical nerve impulses to the brain.

Question 9

staples

Answer 9

convey sound vibrations from incus to inner ear

Question 10

tympanic membrane (eardrum)

Answer 10

transmits and amplifies sound to inner ear

Question 11

basilar membrane

Answer 11

fluid-filled channel leading to the cochlea

Question 12

Hair cells are stimulated by movement of hairs that tickle the tectorial membrane. (T or F)

Answer 12

True

Question 13

Cochlear implants adjust the incoming sound into ear. (T or F)

Answer 13

False (hearing aids)

Question 14

Bone anchored hearing systems bypass the ear canal and middle ear. (T or F)

Answer 14

True

Question 15

statoconia

Answer 15

crystals in inner ear that activate hair cells and help with balance

Question 16

nystagmus

Answer 16

condition where ears move rapidly and uncontrollably

Question 17

Types of hearing loss (4)

Answer 17

1. Conductive loss (pathological defects of middle ear)
2. Sensorineural loss (defects in cochlea)
3. Damage to auditory cortex
4. Functional deafness (perceptual deficits)

Question 18

congenital hearing loss

Answer 18

hearing loss present at birth

Question 19

Tadoma method

Answer 19

method where deaf-blind person places hand on speaker’s lips and jawline to feel movements and vibrations

Question 20

How long does the average hard-of-hearing individual deny hearing loss?

Answer 20

7 years